Progress 04/01/11 to 03/31/16
Outputs
Target Audience:The main target audience reached during the project consisted of commercial tree fruit growers, particularly peach growers, located within New Jersey, within the mid-Atlantic region, and within the nation. Secondary target audiences were cooperative extension agricultural agents, state-supported IPM scouts, and commercial crop consultants. The final audience was comprised of colleagues working in academia, government agencies, and private industry. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?A newly hired tree fruit pathology technician (2012-) was involved in conducting all of the field and laboratory research studies during the project period. The new technician received training from both the project director as well as other station research specialists, particularly the pomologist. In the latter case, the technician learned the proper pruning, fertilization, and overall care of the orchard plantings. Two newly admitted graduate students were hired for the summer (2013 and 2015) to assist the technician. The students learned the methodology for disease assessments, care of the trees, as well as associated laboratory techniques. The first student was involved in development of the bioassay. How have the results been disseminated to communities of interest?Results were disseminated at the national and international level to commercial growers, independent consultants, agricultural agents, and industry personnel as an invited speaker at the Great Lakes Fruit, Vegetable, and Farm Market Expo, Grand Rapids, MI, and at the Ontario Fruit and Vegetable Convention, Niagara Falls, Canada. Growers in New Jersey received information on research findings through presentations at the South and North Jersey commercial Tree Fruit Meetings, local county tree fruit meetings, articles in the NJAES Plant & Pest Advisory Newsletter, and publication of the NJ Tree Fruit Production Guide. The Newsletter and Guide are also used by growers outside of NJ. Colleagues in the scientific community were updated on research results published in Plant Disease, Crop Protection, HortScience, Acta Horticulturae, Plant Disease Management Reports, and Proceedings to the Annual Cumberland-Shenandoah Fruit Workers Conference. In addition, presentations were given at this latter conference in Virginia; the Southeastern Professional Fruit Workers Conference; the annual meeting of The American Phytopathological Society; and the Annual Meeting of the Northeastern Division of APS. What do you plan to do during the next reporting period to accomplish the goals?
Nothing Reported
Impacts
What was accomplished under these goals?
Over the five-year period of the project, a wide variety of biorational fungicides were examined for their ability to control brown rot blossom blight and rusty spot on peach. Initial results showed that the biological control agent Bacillus subtilis (Serenade MAX), the biorational control compound potassium bicarbonate (Kaligreen), and the plant extract BLAD - a polypeptide of beta-conglutin derived from sweet lupine seeds, could be substituted one-for-one with conventional fungicides during bloom and early cover sprays to effectively control blossom blight and rusty spot. However, results from subsequent growing seasons, during which disease pressure was much higher, indicated that these materials need to be combined (in alternation) with conventional fungicides to yield commercially acceptable control. This integrated approach reduced conventional fungicide usage by 50% while allowing the same amount of disease control as a full conventional program. In addition to the above research on identification of effective organic fungicides, a separate two-year study was conducted to determine the susceptibility of 33 peach cultivars and advanced breeding selections to rusty spot. Resistant cultivars identified by this table do not need fungicide control, while highly susceptible ones most likely require a full conventional program. Cultivars of intermediate susceptibility are the best candidates for the integrated biorational / conventional program; further field studies are needed to confirm these assignments. Initial project experiments showed that the new succinate dehydrogenase inhibitors (SDHI) and anilinopyrimidine (AP) fungicides can be successfully alternated or combined with the older demethylation inhibitor (DMI) fungicides for successful control of brown rot blossom blight and fruit rot. This integration of different chemistries acts as a fungicide resistance management strategy. Also, it was discovered that captan cover sprays applied during summer for scab control also provide control of brown rot at harvest. A novel bioassay was developed which confirmed that the residual captan on fruit was providing the rot control. This residue provides a mechanism for managing resistance development in at-risk fungicides commonly used preharvest for brown rot control. The bioassay may also be an important tool for studying the effects of environment (rain, sun) on fungicide residues. In separate studies, higher rates of copper compounds applied to control peach bacterial spot were observed to increase the proportion of marketable fruit; however, increased phytotoxicity may limit copper usage. Finally, for the third objective, a scab sporulation model was created that quantified the effects of temperature and duration of high relative humidity on spore production on twig lesions. At high RH (95-100%), optimum temperature was predicted at 17.9 to 20.2C. This model has the potential use in disease forecasting systems for prediction of optimum timing of fungicide applications. In summary, all of these findings related to use of biofungicides and improvements in application timing with the bioassay or model will allow current commercial peach growers to improve the efficiency and efficacy of their disease management programs. This outcome in turn will reduce costs and improve profitability. Furthermore, by substituting and incorporating biorational materials into their programs, conventional pesticide residues in the environment and on harvested fruit will be reduced, thereby benefiting the consuming public. Usage of biorational materials in the field will also reduce applicator exposure to conventional pesticides. Finally, proper deployment of conventional fungicide chemistries, as verified with the bioassay, will aid in limiting development of fungicide resistant strains of the various peach pathogens.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2015
Citation:
Lalancette, N., Gager, J., and McFarland, K.A. 2015. An in vivo bioassay for estimating fungicide residues on peach fruit. Plant Dis. 99:1727-1731.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2016
Citation:
Lalancette, N., Blaus, L., Gager, J., and McFarland, K. 2016. Contribution of protectant fungicides applied as mid-season cover sprays to management of peach brown rot at harvest. Annual Meeting of The American Phytopathological Society, 31Jul-3Aug, Tampa, FL.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2015
Citation:
Lalancette, N., Blaus, and Rossi, S. 2015. Efficacy and crop safety of kasugamycin: Control of bacterial spot of peach. The Cumberland-Shenandoah Fruit Workers Conference, 91st Annual Meeting, Dec 3-4, Winchester, VA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2015
Citation:
Lalancette, N., Blaus, L., Gager, J., and McFarland, K. 2015. Contribution of mid-season cover sprays to management of peach brown rot at harvest II. The Cumberland-Shenandoah Fruit Workers Conference, 91st Annual Meeting, Dec 3-4, Winchester, VA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2015
Citation:
Lalancette, N., Blaus, and Rossi, S. 2015. Management of peach, blossom blight, rusty spot, and brown rot, 91st Annual Meeting, Dec 3-4, Winchester, VA
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2015
Citation:
Lalancette, N., Blaus, L., Gager, J., and McFarland, K. 2015. Contribution of mid-season cover sprays to management of peach brown rot at harvest II. The Southeastern Professional Fruit Workers Conference, Oct 6-8, Montgomery, AL.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2016
Citation:
Lalancette, N. 2016. Contribution of mid-season cover sprays to management of brown rot at harvest. National Peach Council Program, Mid-Atlantic Fruit & Vegetable Convention, Feb 2-4, Hershey, PA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2016
Citation:
Lalancette, N. 2016. Peach scab: Biology and control. Ontario Fruit and Vegetable Convention, Feb 17-18, Niagara Falls, Ontario, Canada.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2016
Citation:
Lalancette, N. 2016. Peach bacterial spot management: Comparison of copper compounds and rates. Ontario Fruit and Vegetable Convention, Feb 17-18, Niagara Falls, Ontario, Canada.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2016
Citation:
Lalancette, N. 2016. Contribution of mid-season cover sprays to management of brown rot at harvest. North Jersey Commercial Fruit Growers Meeting, Feb 24, Hunterdon County Complex, Flemington, NJ.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2016
Citation:
Lalancette, N. 2016. Peach scab: Epidemiology and management. South Jersey Commercial Tree Fruit Grower Meeting, Feb 25, RAREC, Bridgeton, NJ.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2016
Citation:
Lalancette, N. 2016. Brown rot in beach plums. Commercial Small Fruit and Beach Plum Farm Tour, Jul 13, Stiles Farm & Nursery, Cape May Court House, NJ.
- Type:
Other
Status:
Published
Year Published:
2016
Citation:
Hamilton, G.C., Heckman, J.R., Lalancette, N., Majek, B.A., Nielsen, A., and Ward, D.L. 2016. Plant pathology discipline editor in: D.L. Ward, editor, The New Jersey Commercial Tree Fruit Production Guide, Rutgers Cooperative Extension Bulletin E002, 234 pages.
|
Progress 10/01/14 to 09/30/15
Outputs
Target Audience:The main target audience reached during the reporting period consisted of commercial tree fruit growers, particularly peach growers, located within New Jersey, within the mid-Atlantic region, and within the nation. Secondary target audiences were cooperative extension agricultural agents, state-supported IPM scouts, and commercial crop consultants. The final audience was comprised of colleagues working in academia, government agencies, and private industry. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?A newly hired tree fruit pathology technician (2nd year) was involved in conducting all of the field and laboratory research studies during the project period. The new technician received training from both the project director as well as other station research specialists, particularly the pomologist. In the latter case, the technician learned the proper pruning, fertilization, and overall care of the orchard plantings. A newly admitted graduate student was hired for the summer to assist the technician. The student learned the methodology for disease assessments, care of the trees, as well as associated laboratory techniques. How have the results been disseminated to communities of interest?Results were disseminated at the national level to commercial growers, independent consultants, agricultural agents, and industry personnel as an invited speaker at the Great Lakes Fruit, Vegetable, and Farm Market Expo, Grand Rapids, MI . Growers in New Jersey received information on research findings through presentations at the South and North Jersey commercial Tree Fruit Meetings, local county tree fruit meetings, articles in the NJAES Plant & Pest Advisory Newsletter, and publication of the 2015 NJ Tree Fruit Production Guide. The Newsletter and Guide are also used by growers outside of NJ. Colleagues in the scientific community were updated on research results published in Plant Disease, Acta Horticulturae, Plant Disease Management Reports, and Proceedings to the 90th Annual Cumberland-Shenandoah Fruit Workers Conference. In addition, presentations were given at this latter conference in Virginia; the Southeastern Professional Fruit Workers Conference in Montgomery, AL; the annual meeting of The American Phytopathological Society in Pasadena, CA; and the Annual Meeting of the Northeastern Division of APS in Portsmouth, NH. What do you plan to do during the next reporting period to accomplish the goals?Over the six month reporting period from 1Oct15 through project termination on 31Mar16, presentations will be given at several professional conferences, regional grower meetings, and state-wide commercial grower meetings. The four years of results from the cover spray study will be presented at the Mid-Atlantic Fruit and Vegetable Convention, Hershey, PA for the first time so that growers can begin to adopt it for fungicide resistance management. A new publication describing the novel bioassay will also be published in a refereed journal (currently in press). This bioassay should be useful for estimating effective fungicide residues on many crops, not just peach, so its adoption by other scientists may well be widespread.
Impacts
What was accomplished under these goals?
Field evaluation of the new biorational fungicide BLAD, a polypeptide of beta-conglutin derived from sweet lupine seeds, was performed for a second consecutive growing season on peach. The BLAD polypeptide is the active ingredient in the commercially available fungicide Fracture. The study tested Fracture alone and in alternation with current conventional fungicides. As in 2014, the 2015 results showed a significant reduction in brown rot blossom blight canker incidence when Fracture was used alone, but the level of disease control was insufficient for commercial grower acceptance. Furthermore, when deployed in alternation with conventional fungicides, the level of blight control was also unacceptable and not equivalent to the standard commercial fungicide alone. These latter results disagree with the initial findings from 2014, which demonstrated the alternation program to be commercially acceptable. An unusually high level of blossom blight disease pressure in 2015 was most likely the cause for the difference in findings between years. With respect to the fruit rot phase of brown rot, low rainfall in August once again resulted in low disease pressure at harvest. Under these conditions, all Fracture treatments significantly reduced brown rot fruit rot, and two provided control equivalent to the standard. Given the variable findings, additional studies are needed to fully evaluate the potential of these integrated biorational / conventional fungicide programs. If successful, 50% of the conventional fungicide could be replaced with the organic, biorational alternative without any loss in disease control. In another 2015 field study, six conventional fungicides, each having a different chemistry, and one biorational fungicide were examined for their ability to control both peach blossom blight and rusty spot. Management of these two diseases overlaps in that both require a spray at the petal fall timing. Thus, if one fungicide were able to satisfactorily control both diseases, then only that material is needed at that timing. This change would improve the overall efficiency of the disease control program and overall profitability of the orchard operation. Results of disease assessments showed that three materials provided very good to excellent control of blossom blight canker and two materials provided good control of rusty spot. Unfortunately, none of the fungicides provided acceptable control for both diseases. Although the test examined six different chemistries, some additional chemistries remain to be investigated, as well as a number of organic / biorational materials. Protectant fungicides are applied to peach orchards at regular intervals throughout the summer between bloom and pre-harvest fruit ripening. These materials are primarily applied to control peach scab, rusty spot, and anthracnose. When the fruit begin to mature and ripen, they become susceptible to brown rot. Different, more effective systemic fungicides are then applied during this pre-harvest period for rot control; if not performed properly, 100% of the fruit can rot in three or four days. An observation was made in 2010 which indicated that the summer cover sprays appear to be providing some control of brown rot at harvest. A study was conducted from 2012 through 2015 to verify this finding and to determine which protectant fungicides provided this benefit. A novel bioassay was developed (see the 2014 REEport) to determine the mechanism of this effect. Results showed that only captan provided this benefit, yielding 50 to 60% control of brown rot at harvest. Thus, by using captan cover sprays, disease pressure can be significantly reduced prior to use of the systemic fungicides. This action will not only improve the overall efficacy of the pre-harvest program, but more significantly it will reduce the selection pressure for isolates resistant to the at-risk systemic fungicides. The development of fungicide-resistant strains of the brown rot pathogen has been a major problem in practically all peach-growing regions in the eastern United States. Future studies are planned to determine the optimum rate and timing of the captan sprays. Peach bacterial spot alone has caused considerable (75%) commercial yield loss in past years. A USDA / IR-4 funded project was conducted in 2015 to determine the efficacy of the new antibiotic kasugamycin for control of bacterial spot. Treatment programs consisted of kasugamycin alone as well as kasugmycin integrated with oxytetracycline and copper bactericides. Although some reduction in incidence and severity of bacterial spot lesions on fruit were observed with kasugamycin, the level of control was not great enough to be statistically significant. However, environmental conditions were highly favorable for disease development and the treatment protocol did not allow flexibility to respond to these conditions. As a result, spray intervals were probably too long, resulting in little residual activity during the many infection periods. Additional field studies with short application intervals, especially during favorable conditions, need to be conducted. In summary, all of these findings related to use of biofungicides and improvements in application timing with the bioassay will allow current commercial peach growers to improve the efficiency and efficacy of their disease management programs. This outcome in turn will reduce costs and improve profitability. Furthermore, by substituting and incorporating biorational materials into their programs, conventional pesticide residues in the environment and on harvested fruit will be reduced, thereby benefiting the consuming public. Usage of biorational materials in the field will also reduce applicator exposure to conventional pesticides. Finally, proper deployment of conventional fungicide chemistries, as verified with the bioassay, will aid in limiting development of fungicide resistant strains of the various peach pathogens.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2015
Citation:
Lalancette, N. and McFarland, K.A. 2015. Effect of biorational fungicides on in vitro growth of Monilinia fructicola. Acta Hort. 1084:563-567.
- Type:
Journal Articles
Status:
Published
Year Published:
2015
Citation:
Lalancette, N., McFarland, K.A., and Burnett, A.L. 2015. Influence of trifloxystrobin on primary inoculum and progression of scab epidemics on stone fruit. Plant Dis. 99:467-473.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2015
Citation:
Lalancette, N., Gager, J., and McFarland, K.A. 2015. Contribution of mid-season cover sprays to management of peach brown rot at harvest. Annual Meeting of The American Phytopathological Society, Aug 1-5, Pasadena, CA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2014
Citation:
Lalancette, N., Gager, J., and McFarland, K. 2014. Contribution of mid-season cover sprays to management of peach brown rot at harvest. The Cumberland-Shenandoah Fruit Workers Conference, 90th Annual Meeting, Dec 4-5, Winchester, VA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2014
Citation:
Lalancette, N., Gager, J., and McFarland, K. 2014. An in vivo bioassay for estimating fungicide residues on peach fruit. The Cumberland-Shenandoah Fruit Workers Conference, 90th Annual Meeting, Dec 4-5, Winchester, VA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2014
Citation:
Lalancette, N., Gager, J., and McFarland, K. 2014. Contribution of mid-season cover sprays to management of peach brown rot at harvest. Annual Meeting of the Northeastern Division, The American Phytopathological Society, Oct 29-31, Portsmouth, NH.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2014
Citation:
Lalancette, N. 2014. Approaches to bacterial spot management in stone fruit. Annual Meeting of the State Horticultural Society of Michigan, Great Lakes Fruit, Vegetable, and Farm Market Expo, Dec 9-11, Grand Rapids, MI.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2015
Citation:
Lalancette, N. 2015. Brown rot management in stone fruit. Annual Meeting of the Cape May Beach Plum Association, Mar 12, Rutgers Cooperative Extension of Cape May County, Cape May Court House, NJ. (Invited)
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2015
Citation:
Lalancette, N. 2015. Incidence and management of Monilinia fructicola flower infections. North Jersey Commercial Fruit Growers Meeting, Mar 4, Hunterdon County Complex, Flemington, NJ.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2015
Citation:
Lalancette, N. 2015. Peach blossom blight: Biology, control, and fungicide resistance management. South Jersey Commercial Tree Fruit Grower Meeting, Feb 10, RAREC, Bridgeton, NJ
- Type:
Other
Status:
Published
Year Published:
2015
Citation:
Hamilton, G.C., Heckman, J.R., Lalancette, N., Majek, B.A., Nielsen, A., and Ward, D.L. 2015. Plant pathology discipline editor in: D.L. Ward, editor, The New Jersey Commercial Tree Fruit Production Guide, Rutgers Cooperative Extension Bulletin E002, 232 pages.
- Type:
Other
Status:
Published
Year Published:
2015
Citation:
Lalancette, N. 2015. Brown Rot Management in a Wet Growing Season: Part I. Plant and Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 21July15.
- Type:
Other
Status:
Published
Year Published:
2015
Citation:
Lalancette, N. 2015. Brown Rot Management in a Wet Growing Season: Part II. Plant and Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 24July15.
- Type:
Other
Status:
Published
Year Published:
2015
Citation:
Lalancette, N. 2015. Brown Rot Management in a Wet Growing Season: Part III. Plant and Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 29July15.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2015
Citation:
Lalancette, N. 2015. Rising levels of peach blossom blight and rusty spot over an 18-year period: circumstantial evidence of climate change impact. Climate Change and Agriculture in New Jersey: A Workshop for Extension Faculty and Staff, Mar 4, Rutgers EcoComplex, Bordentown, NJ
|
Progress 10/01/13 to 09/30/14
Outputs
Target Audience: The main target audience reached during the reporting period consisted of commercial tree fruit growers, particularly peach growers, located within New Jersey, within the mid-Atlantic region, and within the nation. Secondary target audiences were cooperative extension agricultural agents, state-supported IPM scouts, and commercial crop consultants. The final audience was comprised of colleagues working in academia, government agencies, and private industry. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? A newly hired tree fruit pathology technician was involved in conducting all of the field and laboratory research studies during the Summer of 2014. The new technician received training from both the project director as well as other station research specialists, particularly the pomologist. In the latter case, the technician learned the proper pruning, fertilization, and overall care of the orchard plantings. How have the results been disseminated to communities of interest? Results were disseminated at the national level to commercial growers, independent consultants, agricultural agents, and industry personnel as an invited speaker at the Mid-Atlantic Fruit and Vegetable Convention, Hershey, PA. Growers in New Jersey received information on research findings through presentations at local tree fruit meetings, articles in the NJAES Plant & Pest Advisory Newsletter, and publication of the 2014 NJ Tree Fruit Production Guide. The Newsletter and Guide are also used by growers outside of NJ. Colleagues in the scientific community were updated on research results published in HortScience, Plant Disease Management Reports, and Proceedings to the 89th Annual Cumberland-Shenandoah Fruit Workers Conference. In addition, presentations were given at this latter conference in Virginia, the Southeastern Professional Fruit Workers Conference at Clemson University, the annual meeting of The American Phytopathological Society, and the Annual Meeting of the Northeastern Division of APS. What do you plan to do during the next reporting period to accomplish the goals? Field and laboratory research on the efficacy of biorational and conventional fungicides for control of peach diseases will continue as outlined in the objectives. The amount of research conducted, particularly with the biofungicides, is dependent on continued support from the USDA/IR-4 Biopesticide Research Program (this program is now using a different model for funding projects, which may not be favorable). Field research investigating fungicide residues using the new bioassay technique will continue and be expanded. This work, as well as studies on peach bacterial spot management, need to be repeated given the lack of fruit in 2014.
Impacts
What was accomplished under these goals?
Sub-zero temperatures in January and February 2014 and a major hail storm in May 2014 caused considerable fruit loss in many of the experimental peach orchards. This limited the amount of field studies conducted and made statistical comparisons difficult to interpret. Nevertheless, promising results were obtained from several experiments in blocks that had below-normal but acceptable numbers of fruit. One study examined the new biorational material BLAD, a polypeptide of beta-conglutin derived from sweet lupine seeds, and a combination of copper octanoate (a fatty acid copper material approved for organic use) plus the biological control agent Bacillus amyloliquefaciens. These biorational products, currently produced by commercial companies, were tested alone and in alternation with current conventional fungicides. Significant reductions in brown rot blossom blight canker incidence was observed for these biorationals when used alone, but the level of disease control was insufficient for commercial grower acceptance. However, when deployed in alternation with conventional fungicides, the level of blight control was acceptable and equivalent to the standard commercial fungicide alone. Thus, 50% of the conventional fungicide could be replaced with the organic, biorational alternative without any loss in disease control. Unfortunately, low rainfall in August resulted in very low levels of the fruit rot phase of the disease for all treatments. Under these conditions, no differences were observed among treatments, including the non-treated control. In previous studies, a number of biofungicides were determined to be partially effective against peach rusty spot (see 2013 report). These materials can be effectively deployed in integrated programs with conventional fungicides (as with blossom blight – see above). Another alternative is to combine their use with cultivar resistance to rusty spot. In this regard, a two-year study was completed and published which evaluated 33 peach cultivars and advanced breeding selections for resistance to rusty spot. These cultivars were characterized according to their traits and placed into five susceptibility groups. This information allows growers to select cultivars with very low susceptibility (fungicide control not needed); low to moderate susceptibility (partially effective biofungicides acceptable); or high to very high susceptibility (conventional fungicides needed). Note growers would only select susceptible cultivars if they had other traits that were deemed more important. With respect to research on conventional fungicides, a novel bioassay was developed for estimating fungicide residues on peach fruit. The intent of the bioassay was not to determine existence of residues on fruit ready for consumption (this can be done best with chemical tests), but rather to determine if sufficient residue exists to provide acceptable disease control. Once a fungicide is applied, many environmental factors such as sunlight and rainfall cause a gradual decline in the residue. The bioassay can be used to quantitatively determine how these and other factors degrade the residue. Once these relationships are understood, growers need only apply fungicides when residues have diminished below an acceptable control threshold, rather than on a strict calendar basis. Using this “informed approach”, fungicides are only applied when they are needed for protection against disease development, rather than routinely. In summary, all of these findings related to use of biofungicides and improvements in application timing with the bioassay will allow current commercial peach growers to improve the efficiency and efficacy of their disease management programs. This outcome in turn will reduce costs and improve profitability. Furthermore, by substituting and incorporating biorational materials into their programs, conventional pesticide residues in the environment and on harvested fruit will be reduced, thereby benefiting the consuming public. Usage of biorational materials in the field will also reduce applicator exposure to conventional pesticides. Finally, proper deployment of conventional fungicide chemistries, as with the bioassay, will aid in limiting development of fungicide resistant strains of the various peach pathogens. Planned research on peach bacterial spot and efficacy of other novel conventional fungicides was not possible due to lack of fruit in some of the orchards.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2014
Citation:
Lalancette, N., Ward, D.L., and Goffreda, J.C. 2014. Susceptibility of peach cultivars to rusty spot and characterization of susceptibility groups. HortScience 49:615-621.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2014
Citation:
Lalancette, N., McFarland, K.A., and Gager, J. 2014. Effect of biorational fungicides on in vitro germination of Monilinia fructicola conidia. Annual Meeting of The American Phytopathological Society, Aug 10-13, Minneapolis, MN.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2014
Citation:
Lalancette, N. 2014. Peach Bacterial Spot Management: Comparison of Copper Compounds and Rates. South Jersey Commercial Tree Fruit Grower Meeting, Feb 13, RAREC, Bridgeton, NJ
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2014
Citation:
Peter, K., Lalancette, N., and Yoder, K. 2014. Fungicide resistance management. Mid-Atlantic Fruit & Vegetable Convention, Jan 28 30, Hershey, PA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2013
Citation:
Lalancette, N., Gager, J., and McFarland, K. 2013. Peach bacterial spot management: Comparison of copper compounds and rates. The Cumberland-Shenandoah Fruit Workers Conference, 89th Annual Meeting, Nov 29-30, Winchester, VA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2013
Citation:
Lalancette, N., Gager, J., and McFarland, K. 2013. Summary of 2013 fungicide trials on peach. The Cumberland-Shenandoah Fruit Workers Conference, 89th Annual Meeting, Nov 29-30, Winchester, VA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2013
Citation:
Lalancette, N., Gager, J., and McFarland, K. 2013. A simple in vivo bioassay for estimating fungicide residues on peach fruit. Annual Meeting of the Northeast Division, The American Phytopathological Society, Oct 23-25, Southbury, CT.
- Type:
Other
Status:
Published
Year Published:
2014
Citation:
Hamilton, G.C., Heckman, J.R., Lalancette, N., Majek, B.A., Nielsen, A., and Ward, D.L. 2014. Plant pathology discipline editor in: D.L. Ward, editor, The New Jersey Commercial Tree Fruit Production Guide, Rutgers Cooperative Extension Bulletin E002, 232 pages.
- Type:
Other
Status:
Published
Year Published:
2014
Citation:
Lalancette, N. 2014. Copper Bactericides for Peach Bacterial Spot Management. Plant and Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 15May14.
- Type:
Other
Status:
Published
Year Published:
2014
Citation:
Lalancette, N. 2014. Fungicides for Peach Blossom Blight Management. Plant and Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 03Apr14.
|
Progress 10/01/12 to 09/30/13
Outputs
Target Audience: The main target audience reached during the reporting period consisted of commercial tree fruit growers, particularly peach growers, located within New Jersey, within the mid-Atlantic region, and within the nation. Secondary target audiences were cooperative extension agricultural agents, state-supported IPM scouts, and commercial crop consultants. The final audience was comprised of colleagues working in academia, government agencies, and private industry. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? A newly admitted graduate student, prior to formally starting graduate studies in the Fall, was involved in conducting many of the field and laboratory research studies during the Summer of 2013. The student received training from both the project director as well as the tree fruit pathology technician. How have the results been disseminated to communities of interest? Results were disseminated at the national level to commercial growers, independent consultants, agricultural agents, and industry personnel as an invited speaker at the National Peach Council Program during the Mid-Atlantic Fruit and Vegetable Convention, Hershey, PA. Two presentations, one on rusty spot and one on brown rot, were given. Growers in New Jersey received information on research findings through presentations at local tree fruit meetings, articles in the NJAES Plant & Pest Advisory Newsletter, and publication of the 2013 NJ Tree Fruit Production Guide. The Newsletter and Guide are also used by growers outside of NJ. Colleagues in the scientific community were updated on research results published in Crop Protection Journal, Plant Disease Management Reports, and Proceedings to the 88th Annual Cumberland-Shenandoah Fruit Workers Conference. In addition, presentations were given at this latter conference in Virginia, the Southeastern Professional Fruit Workers Conference in Arkansas, and at the 8th International Peach Symposium in Matera, Italy. What do you plan to do during the next reporting period to accomplish the goals? Field and laboratory research on the efficacy of biorational and conventional fungicides and bactericides for control of peach diseases will continue as outlined in objectives 1 and 2. Specifically, a USDA/IR-4 Biopesticide Grant Proposal has been submitted to provide additional funding for field work investigating the BLAD polypeptide and other biological control agents. Pending extra support, studies investigating the influence of abiotic factors, particular temperature, on the monocyclic components of the brown rot disease cycle will be initiated (objective 3); prior work on this objective, modeling of peach scab sporulation, was completed (see previous report).
Impacts
What was accomplished under these goals?
Impact. In a field study examining efficacy of currently available biofungicides, several materials were identified as providing control of peach rusty spot. In separate studies, additional novel biorational materials were examined, along with newly registered copper compounds, for management of peach bacterial spot as well as brown rot blossom blight and fruit rot. Evidence for rusty spot and brown rot disease control activity of these biorational materials, all of which are OMRI listed for use by organic growers, were obtained from experiments conducted in both field plots and in the laboratory. In addition, several new conventional chemistries were examined and shown to be effective against brown rot at key stages in the disease cycle. All of these findings will allow current commercial peach growers to improve the efficiency and efficacy of their disease management programs. Furthermore, by substituting and incorporating biorational materials into their programs, conventional pesticide residues in the environment and on harvested fruit will be reduced. Usage of biorational materials in the field will also reduce applicator exposure. Finally, proper deployment of conventional fungicide chemistries will aid in limiting development of fungicide resistant strains of the various peach pathogens. Objective 1. In the rusty spot biofungicide field study, a total of nine biorational fungicides, most commercially available, were examined. The three effective biorational compounds that significantly reduced peach rusty spot were the biological control agent Bacillus subtilis, the inorganic compound potassium bicarbonate (closely related to baking soda), and neem oil, a plant extract. Although disease reductions by these materials were statistically significant, the amount of disease control was relatively low, ranging from 24 to 34%, versus 94% control for the conventional myclobutanil standard. Thus, these biorationals provide insufficient efficacy for commercial management of rusty spot when used alone. However, since these materials consistently provided some level of control, they may be candidates for use in integrated program with conventional fungicides. Alternatively, they can be used with less susceptible cultivars. A study designed to determine the relative susceptibility of peach cultivars to rusty spot is currently in progress. Field studies have also demonstrated the effectiveness of Bacillus subtilis and potassium bicarbonate for management of peach brown rot, particularly the blossom blight phase. In vitro studies are in progress to determine the effective dosage of these compounds in controlling the growth of the fungal brown rot pathogen, Monilinia fructicola. These results can be compared to current product label rates, allowing adjustments to improve overall efficacy. The new biorational material BLAD, a polypeptide of beta-conglutin derived from sweet lupine seeds, along with the biological control agent Streptomyces lydicus, were also tested for control of peach bacterial spot and brown rot. Neither material provided acceptable management of bacterial spot and S. lydicus was also ineffective against brown rot. However, the BLAD protein did demonstrate some activity for control of brown rot; additional data are needed. Objective 2. Newly released copper bactericides containing the active ingredients copper oxychloride + copper hydroxide, cuprous oxide, and copper octanoate, all of which are OMRI listed for use by organic growers, were examined and compared at two rates to the standard copper hydroxide for control of peach bacterial spot. Results of the two-year factorial study showed that all of these materials provided the same level of fruit disease control when the materials were deployed at the same metallic copper rate per acre. However, results also demonstrated that significant increases in the amount of high quality fruit (market grade 1) and total marketable fruit (grades 1 + 2) can be achieved when increasing the rate of metallic copper from 1 to 2 oz per acre. Blossom blight incidence has been increasing in recent years, possibly due to warmer winters and springs as a result of climate change. In 2013, several conventional fungicides only labeled for early season usage, including two formulations of iprodione, were shown to provide 85-87% control of the blossom blight phase of brown rot under heavy disease pressure. Since the chemistries of these materials are different than those used for later season brown rot control, their usage ‘up front’ provides an important strategy for fungicide resistance management. In contrast, the older protectants captan and chlorothalonil were not effective, yielding only 40-51% control of blossom blight. Thus, their use for early season disease control / resistance management should be limited. Objective 3. Research on environmental factors was not conducted during this period of the project.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Lalancette, N., Furman, L.A., and White, J.F. 2013. Management of peach rusty spot epidemics with biorational fungicides. Crop Prot. 43:7-13
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2013
Citation:
Lalancette, N. and McFarland, K.A. 2013. Effect of biorational fungicides on in vitro growth of Monilinia fructicola. Eighth International Peach Symposium, International Society for Horticultural Science, Jun 16-20, Matera, Italy.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2013
Citation:
Lalancette, N. 2013. Late season fruit rots on peach. National Peach Council Program, Mid-Atlantic Fruit & Vegetable Convention, Jan 29 31, Hershey, PA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2013
Citation:
Lalancette, N. 2013. Peach rusty spot management. National Peach Council Program, Mid-Atlantic Fruit & Vegetable Convention, Jan 29 31, Hershey, PA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2013
Citation:
Lalancette, N. 2013. The New Jersey Tree Fruit Production Guide: Update on disease control for 2013. North Jersey Commercial Tree Fruit Meeting, Mar 5, Snyder Farm, Pittstown, NJ.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2012
Citation:
Lalancette, N., Ward, D., and Goffreda, J. 2012. Susceptibility and characterization of peach cultivars to rusty spot. The Cumberland-Shenandoah Fruit Workers Conference, 88th Annual Meeting, Nov 29-30, Winchester, VA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2012
Citation:
Lalancette, N. and McFarland, K. 2012. Summary of 2012 fungicide and bactericide trials on peach. The Cumberland-Shenandoah Fruit Workers Conference, 88th Annual Meeting, Nov 29-30, Winchester, VA.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2012
Citation:
Lalancette, N. and Ward, D. 2012. Susceptibility of peach cultivars to rusty spot. The Southeastern Professional Fruit Workers Conference, Oct 23-25, Clarksville, AR.
- Type:
Other
Status:
Awaiting Publication
Year Published:
2014
Citation:
Lalancette, N., Gager, J., and McFarland, K.A. 2014. Comparison of fungicide programs for full-season management of peach diseases, 2013. Plant Disease Management Reports 8:STFxxx. Online publication doi:10.1094/PDMR08 (pending).
- Type:
Other
Status:
Awaiting Publication
Year Published:
2014
Citation:
Lalancette, N., Gager, J., and McFarland, K.A. 2014. Peach blossom blight and rusty spot control, 2013. Plant Disease Management Reports 8:STFxxx. Online publication doi:10.1094/PDMR08 (pending).
- Type:
Other
Status:
Awaiting Publication
Year Published:
2014
Citation:
Lalancette, N., Gager, J., and McFarland, K.A. 2014. Examination of copper and biorational bactericides for control of bacterial spot on peach and plum, 2013. Plant Disease Management Reports 8:STFxxx. Online publication doi:10.1094/PDMR08 (pending).
- Type:
Other
Status:
Published
Year Published:
2013
Citation:
Hamilton, G.C., Heckman, J.R., Lalancette, N., Majek, B.A., Nielsen, A., and Ward, D.L. 2013. Plant pathology discipline editor in: D.L. Ward, editor, The New Jersey Commercial Tree Fruit Production Guide, Rutgers Cooperative Extension Bulletin E002, 228 pages.
- Type:
Other
Status:
Published
Year Published:
2013
Citation:
Lalancette, N. 2013. Integrated Preharvest Fungicide Programs for Brown Rot. Plant and Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 08Jul13.
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Progress 10/01/11 to 09/30/12
Outputs
OUTPUTS: A warm 2011-2012 winter and early spring provided highly favorable inoculum and climatic conditions for development of peach diseases. The ability of conventional and biorational fungicides and bactericides to control these diseases were examined in four field studies conducted during the 2012 growing season. In two of these studies, newly released conventional fungicides as well as experimental materials were applied as treatments to investigate their efficacy for management of peach blossom blight, rusty spot, scab, and brown rot. Experimental treatments were compared to each other and to the standard fungicide program. A third study compared four different copper-based bactericides at two high rates to determine if management of bacterial spot epidemics could be improved. This study included a new "marketable fruit" disease assessment based on commercial grower packing grades for fruit. A fourth field study continued examination of three biorational fungicides for management of brown rot blossom blight and fruit rot. Finally, a mathematical model describing peach scab sporulation as a function of temperature and duration of high relative humidity was validated. Predicted and observed test data from random samples of the collected data were used in the validation study, which was reported at the 2011 Northeastern Division Annual Meeting of the American Phytopathological Society, New Brunswick, NJ. Results of field studies were presented at the 88th Cumberland-Shenandoah Fruit Workers Meeting, Winchester, VA. Applied outputs of this research were reported at local and regional grower meetings, the NJAES Plant & Pest Advisory fruit newsletter (7 articles), and in the New Jersey Commercial Tree Fruit Production Guide. PARTICIPANTS: N. Lalancette - principal investigator; coordinate project; field execution; data analysis; writing K.A. McFarland - technician; field set-up and execution; disease assessment; writing; tree care A.L. Burnett - graduate student research assistant; disease assessment; writing TARGET AUDIENCES: Audiences - commercial peach growers; tree fruit pathologists; extension agents; industry reps Efforts - local and regional grower meetings PROJECT MODIFICATIONS: Research on peach bacterial spot was added to the project given its commercial importance. The objectives and methods for investigating this disease are the same as stated for the fungal diseases. Note that bacterial spot, along with brown rot and scab, was listed in the project's introduction as one of the three major diseases of peach that can limit production.
Impacts
Record high levels of blossom blight canker formation in 2012 provided an opportunity to examine the efficacy of both novel conventional and biorational fungicides under heavy disease pressure. Newly registered succinate dehydrogenase inhibitor (SDHI) and quinone outside inhibitor (QoI) fungicides and mixtures of them yielded excellent disease control. However, the tested biorational fungicides were not able to maintain commercially acceptable control under the unusually high disease-favorable conditions. In past growing seasons, under more typical disease pressure, the biorational fungicides provided good to excellent control. Rusty spot incidence in 2012 was also at record levels, reaching nearly 80% fruit infection in one test orchard. Under these conditions, the standard four-spray program was increased to five sprays, which provided 90% disease control and 95% reduction in fruit lesion density. When the second and fourth applications were omitted, trees treated with the resultant three-spray program had significantly more infected fruit [than the five-spray program]; disease control with the reduced program was only 65%. Similar results were observed in past years under lower disease pressure, thereby indicating that all applications are necessary to adequately control rusty spot fruit infection on moderate to highly susceptible cultivars. Bacterial spot fruit infection was also high in 2012. Approximately 77% of non-treated fruit were categorized as "cull" using the new marketable fruit rating system. In general, results from the field study on highly susceptible O'Henry cultivar showed that increasing the amount of actual copper in applications from 1 to 2 oz per acre caused a significant increase in marketable fruit. For example, the percent marketable fruit treated with a copper hydroxide + copper oxychloride bactericide increased from 46% to 89% when the application rate was increased. These results suggest that crop loss from bacterial spot fruit infection and the subsequent reduction in grower profits, which are not uncommon among commercial growers, can be avoided in disease-favorable years. However, since copper is also phytotoxic to peach trees, further work is needed to determine if the higher rates are causing significant injury to the trees. Product labels will also need to be modified to accommodate the new rates and application timings. Finally, results from the peach scab sporulation modeling project demonstrated that ambient air temperature and duration of relative humidity described 90 to 94% of the variation in spore production. The optimum temperature for sporulation ranged from 17.9-20.2C with an overall average of 18.8C. The relationship between the observed test values and predicted values was linear and highly significant, with >94% of the predicted values within the 95% prediction interval. In summary, the derived models give a quantitative description of sporulation by the peach scab pathogen, Fusicladium carpophilum, and may have potential use in simulators and disease forecasting systems.
Publications
- Lalancette, N. 2012. New fungicides for brown rot control on stone fruit II. Plant & Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 24Jul, Vol. 17, No. 17
- McFarland, K.A. and Lalancette, N. 2013. Comparison of copper bactericides for efficacy against bacterial spot on peach, 2012. Plant Disease Management Reports 7:STFxxx. Online publication (pending).
- Lalancette, N. 2012. Plant pathology discipline editor in: D.L. Ward, editor, 2012 New Jersey Commercial Tree Fruit Production Guide, Rutgers Cooperative Extension Bulletin E002, 229 pages.
- Lalancette, N. 2012. Constriction canker management on peach: Fungicide control. Plant & Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 28Aug, Vol. 17, No. 22
- Lalancette, N. 2012. Constriction canker management on peach: Cultural control. Plant & Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 14Aug, Vol. 17, No. 20
- Lalancette, N. 2012. New fungicides for brown rot control on stone fruit. Plant & Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 10Jul, Vol. 17, No. 15
- Lalancette, N. 2012. Record peach disease levels for 2012. Plant & Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 29May, Vol. 17, No. 9
- Lalancette, N. 2012. Tree fruit fungicide update: Inspire Super. Plant & Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 17Apr, Vol. 17, No. 3
- Lalancette, N. 2012. Management of peach blossom blight. Plant & Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, 21Mar, Vol. 16, No. 33
- Lalancette, N., McFarland, K.A., and Burnett, A.L. 2012. Modeling sporulation of Fusicladium carpophilum on nectarine twig lesions: Relative humidity and temperature effects. Phytopathology 102:421-428.
- Lalancette, N., McFarland, K.A., and Burnett, A.L. 2012. Peach scab sporulation model development and validation. Phytopathology 102:S1.4
- McFarland, K.A. and Lalancette, N. 2013. Management of peach diseases with experimental and newly registered fungicides, 2012. Plant Disease Management Reports 7:STFxxx. Online publication (pending).
- McFarland, K.A. and Lalancette, N. 2013. Management of peach scab with Quadris Top and Inspire Super, 2012. Plant Disease Management Reports 7:STFxxx. Online publication (pending).
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Progress 01/01/11 to 12/31/11
Outputs
OUTPUTS: Three field experiments, each conducted in separate experimental peach orchards, were performed during the 2011 growing season. In one study, three different biofungicides at low and high application rates were applied as treatments to investigate their efficacy for management of peach brown rot blossom blight and fruit rot. Results for the biofungicides were compared to a standard conventional fungicide program. Percent of shoots with blossom blight canker and percent of harvested fruit with rot were the dependent variables. In two other field studies, experimental fungicides consisting of mixtures of two active ingredients having different chemistries were examined for their efficacy at controlling peach brown rot and scab. Experimental treatments were compared to each other and the standard fungicide program. Research results of these studies were presented at the 2011 Annual Meeting of the American Phytopathological Society, Honolulu, HI and at the 87th Cumberland-Shenandoah Fruit Workers Meeting, Winchester, VA. Applied outputs of this research were reported at local and regional grower meetings, the NJAES Plant & Pest Advisory fruit newsletter, and in the NJ Commercial Tree Fruit Production Guide. PARTICIPANTS: N. Lalancette - principal investigator; coordinate project; field execution; data analysis; writing. K.A. McFarland - technician; field set-up and execution; disease assessment; writing. B. Dugan - summer undergraduate student; disease assessment; tree care & maintenance. TARGET AUDIENCES: Audiences - commercial peach growers; tree fruit pathologists; extension agents; industry reps Efforts - local and regional grower meetings PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
Management of peach brown rot blossom blight is currently dependent on two to three applications of conventional fungicides during bloom. Biorational fungicides or biofungicides, many of which are approved for organic production, are possible alternatives to conventional products, but very little information is available on their efficacy against blossom blight. To study these materials, funding was obtained from the USDA/IR-4 Biopesticide & Organic Support Research Program. Results from the field studies indicated that the biological control agent Bacillus subtilis (Serenade MAX) and the biorational fungicide potassium bicarbonate (Kaligreen) can be substituted one-for-one with conventional fungicides during bloom. At tested application rates, Serenade MAX provided 84 to 87% control while Kaligreen yielded 74 to 80% control. Somewhat higher canker levels were observed for the biofungicide treatments relative to the standard, but most differences were not statistically significant. Integration of these biofungicides in commercial disease control programs would reduce residues of conventional fungicides in the environment and lessen worker exposure to them, while providing a mechanism for fungicide resistance management. Research investigating the efficacy of biofungicides at controlling the fruit rot phase of brown rot is ongoing. Demethylation inhibitor (DMI) fungicides have been the most important fungicides for management of peach brown rot over the last 10-15 years. However, within the last few years, DMI-resistant strains of the brown rot pathogen have been detected in a number of states, including New Jersey. Resistance development is also possible for the peach scab pathogen. One strategy to reduce the likihood of resistance development is to apply mixtures of fungicides of different chemistries. Field studies were conducted to examine the efficacy of mixtures of DMI fungicides with the quinone outside inhibitor (QoI), succinate dehydrogenase inhibitor (SDHI), and anilinopyrimidine (AP) fungicides. Results showed good to excellent control of brown rot blossom blight, brown rot fruit rot, and scab by the experimental fungicide mixtures. Thus, when available for commercial use, peach growers should be able to easily integrate these newer fungicide pre-mixes into their disease control programs without fear of yield loss.
Publications
- Lalancette, N. and McFarland, K.A. 2011. Management of peach blossom blight canker development with biorational fungicides. Phytopathology 101:S97.
- McFarland, K.A. and Lalancette, N. 2012. Management of peach brown rot blossom blight and fruit rot, 2011. Plant Disease Management Reports 6:STFxxx. Online publication (pending).
- McFarland, K.A. and Lalancette, N. 2012. Management of peach scab with fungicide mixtures, 2011. Plant Disease Management Reports 6:STFxxx. Online publication (pending).
- Lalancette, N. 2011. Programs for peach scab management. Plant & Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, Vol. 16 No. 4
- Lalancette, N. 2011. Brown rot and the brown marmorated stink bug: A perfect storm. Plant & Pest Advisory, Fruit Edition, NJ Agricultural Experiment Station Newsletter, Vol. 16 No. 12
- Lalancette, N. 2011. Plant pathology discipline editor in: D.L. Ward, editor, The New Jersey Commercial Tree Fruit Production Guide, Rutgers Cooperative Extension Bulletin E002, 229 pages.
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