Progress 09/01/18 to 11/30/20
Outputs
Target Audience:The target audiences for this project were growers, extension agents, and manufacturers. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?The following summarizes the progress through the end of the project. At the University of Florida, two graduate students were involved; one successfully defended his doctoral dissertation on this topic. At Cornell University, one undergraduate intern was partially funded by this project; she worked on various aspects of UV array construction and testing. How have the results been disseminated to communities of interest?Results of research on UV have been disseminated by the many presentations and press releases listed under 'Products' in this report. Results from the field trials in 2020 showed successful disease suppression, equal to or superior to fungicide. What do you plan to do during the next reporting period to accomplish the goals?The project has ended, however, the project team will continue to promote project results through the website http://lightandplanthealth.org/ and via other publications and presentations. The team will also seek additional funding to continue work on using UV to combat PM as well as other plant diseases on a variety of vegetable and fruit crops, as well as to conduct additional outreach activities to growers and other stakeholders.
Impacts
What was accomplished under these goals?
The following summarizes progress through the end of the project. Devices for UV application were successfully built with strawberry growers in California (CA) and Florida (FL). The field trials were successfully completed in CA and FL in 2020. Treatments were done1x/week and 2x/week, and were compared to fungicide and nontreated control. In CA, disease incidence and severity were assessed at 7-day intervals by Driscoll's personnel. Disease assessments were coordinated with Co-PDs Peres and Gadoury. Kelly Ivors of Driscoll was a critical collaborator to evaluate the disease severity, conduct experiments and perform statistical analysis in the CA trials. In FL, disease incidence and severity were assessed at 7-day intervals by UFL researchers under the direction of Peres. Results: For powdery mildew (PM) control at a treatment frequency of once per week, UV performed as well as the standard fungicide program, however only the CA study reported statistical significance for this comparison. At a frequency of twice per week, FL reported significant reductions of 90% and 83% for foliar and fruit assessments, respectively, compared to non-significant reductions of 23% and 31% for the standard chemical fungicide treatment. The benefit of reducing PM was reflected in the fruit yield results. In CA, yields were significantly higher by similar amounts for both the UV and chemical fungicide treatments, whereas in FL, yield only had a significant increase for the twice weekly UV treatment, but the increase was dramatic at 30%. The insight drawn from these results is that the frequency of UV treatment is critical for its performance. Once weekly was initially chosen for studies because it is the same frequency used for chemical fungicide treatment. It is clear from both studies that UV is effective for controlling PM at once per week, but what looks very promising is the gain in effectiveness at higher treatment frequencies that far surpasses chemical fungicide performance. Higher frequency is strictly a labor/logistical issue where costs can be reduced by scale and automation. Progress against Objectives I, II and III: We have developed a number of work products (listed in the following section) that included presentations made to growers, co-authorship of publications, as well as instructions to build UV-C systems on-farm and instructions for their quantification and safe operation These kits have been successfully used by growers on farms that have no prior experience in lighting design and construction The results were recorded and analyzed to educate the community in comparison to the best in class uses of fungicide All of the project outreach efforts have been completed. However, outreach efforts to growers and other stakeholders will continue after the project period.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2020
Citation:
Skinner, N., Bullough, J., Rea, M. 2020. Science enlightening agriculture: Helping growers improve crops with UV light. Country Folk Grower, Volume 20, number 1.
https://cfgrower.com/science-enlightening-agriculture-helping-growers-improve-crops-with-uv-light/
Mello, P., Onofre, R.B., Lopes, U. 2020. Evaluation of Ultraviolet Light for Suppression of Botrytis Fruit Rot (Botrytis cinerea) in vitro, in open-field production, and post-harvest. Plant Health 2020 APS Annual Meeting. https://apsnet.confex.com/apsnet/2020/meetingapp.cgi/Paper/16929
Onofre, R.B. 2020. ⿿Alternative Strategies for Management of Strawberry Powdery Mildew. Doctoral Exit Seminar at University of Florida. July 2020.
- Type:
Journal Articles
Status:
Accepted
Year Published:
2020
Citation:
Rea, M. S., J. D. Bullough and A. C. Bierman. ⿿Output Reduction over Time of UV-C Germicidal Lamps Used for Treating Agricultural Crops [Manuscript submitted for publication]
Onofre, R., Gadoury, D., Stensvand, A., Bierman, A., Rea, M., and Peres, N.A. 2020. UV-Transmissing Plastics Reduce Powdery Mildew in Strawberry Tunnel Production. Plant Disease [manuscript submitted for publication]
Onofre, R.B, et al. ⿿Use of Ultraviolet Light to Suppress Powdery Mildew in Strawberry Fruit Production Fields. Accepted with revisions to Plant Disease Journal. (accepted)
Mello, P.P., Onofre, R.B., Rea, M., Bierman, A., Gadoury, D., Ivors, K., Ganci, M., Broome, J., and Peres, N.A. Evaluating Nighttime UV-C applications for the Management of Strawberry Powdery Mildew and Botrytis Fruit Rot in Florida and California. (in preparation)
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2019
Citation:
Gadoury. D.M. 2019. The Potential of Light Treatments to Suppress Certain Plant Pathogens and Pests. Appellation Cornell. Research Focus 2019-3:1-7.
Stensvand, A., Suthaparan, A., Asalf, B., Pathak, R., Gislerød, H.R., Solhaug, K.A., From, P., Onofre, R., Peres, N., Turechek, W., Bierman, A., Rea, M., Cadle Davidson, L., Gadoury, D.M. 2019. Alternative means to control powdery mildews. 51st Congress of the Southern African Society for Plant Pathology, Langebaan, South Africa, January 20 ⿿ 23, 2019. Book of Abstracts, p. 88.
Onofre, R.B., Gadoury, D.M., Stensvand, A., Rea, M., Bierman, A., and Peres, N. 2019. Evaluation of UVC for suppression of powdery mildew and other diseases in open field strawberry production. Phytopathology 109:S2.124-125.
Peres, N.A., Turechek, W., Gadoury, D.M., Stensvand, A. & Schnabel, G. 2019. Strategic management of multiple diseases in strawberry nurseries and production fields. 9th North American Strawberry Symposium. Orlando, Florida, February 3 ⿿ 6, 2019. Book of abstracts, p. 11.
Gadoury, D.M., Bierman, A., Rea, M., Stensvand, A., Suthaparan, A., Onofre, R.B. & Peres, N.A. 2019. Design and operational considerations for use of ultraviolet light for disease and pest suppression under field conditions. 9th North American Strawberry Symposium. Orlando, Florida, February 3 ⿿ 6, 2019. Book of abstracts, p. 15.
Stensvand, A., Suthaparan, A., Asalf, B., Pathak, R., Gislerød, H.R., Solhaug, K.A., From, P., Onofre, R., Peres, N.A., Turechek, W., Bierman, A., Rea, M., Cadle-Davidson, L. and Gadoury, D.M. 2019. Non-chemical control of powdery mildew in strawberry. 9th North American Strawberry Symposium. Orlando, Florida, February 3 ⿿ 6, 2019. Book of abstracts, p. 16.
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Progress 09/01/19 to 08/31/20
Outputs
Target Audience:The target audiences for the work in this past project year include, growers, extension agents, and equipment manufacturers. Changes/Problems:Due to changes in administration at Lighting Research Center, the LightandPlantHealth website will be transferred to Cornell AgriTech's servers. What opportunities for training and professional development has the project provided?The following summarizes high level progress through August 31, 2020. At the University of Florida, two graduate students were involved; one successfully defended his doctoral dissertation on this topic (details below.) At Cornell University, one undergraduate intern was partially funded by this project; she worked on various aspects of UV array construction and testing. How have the results been disseminated to communities of interest?Results of research on UV have been disseminated by the many presentations and press releases listed under 'Products' as part of Objective I. Results from the field trials in 2020 showed successful disease suppression, equal to or superior to fungicide. What do you plan to do during the next reporting period to accomplish the goals?The design and construction of devices for UV applications in FL and CA is complete. Strawberry fields in Florida were planted in mid-November 2019 and UV applications started in early December and continued into March 2020. At the California field, strawberry fields were planted in July 2019, UV applications began later in July 2019 and ended in November 2019. For both sites we optimized the design of the UV delivery apparatus and established procedures for verifying the application of the proper UV dose. The results confirmed that our UV approach can be as good as or better than the best in class fungicide application. Phase III outreach is underway, and will continue through the extended contract period (ending November 2020).
Impacts
What was accomplished under these goals?
The following summarizes high level progress through August 31, 2020. Devices for UV application were successfully built with strawberry growers in CA and FL. The field trials were successfully completed in California and Florida in 2020. Treatments were done1x/week and 2x/week, and were compared to fungicide and untreated control. In CA disease incidence and severity were assessed at 7-day intervals by Driscoll's personnel. Disease assessments were coordinated with Co-PDs Peres and Gadoury. Kelly Ivors of Driscoll has also been a critical collaborator to evaluate the disease severity, conduct experiments and perform statistical analysis in the CA trials. In FL disease incidence and severity were assessed at 7-day intervals by UFL researchers under the direction of Peres. Results: For PM control at a treatment frequency of once per week, UV performed as well as the standard fungicide routine, however only the CA study reported statistical significance for this comparison. At a frequency of twice per week FL reported significant reductions of 90% and 83% for foliar and fruit assessments, respectively, compared to non-significant reductions of 23% and 31% for the standard chemical fungicide treatment. The benefit of reducing PM were reflected in the fruit yield results. In CA the yields were significantly higher by similar amounts for both the UV and chemical fungicide treatments, while in FL yield only had a significant increase for the twice weekly UV treatment, but increase was dramatic at 30%. The insight drawn from these results is that the frequency of UV treatment is critical for its performance. Once weekly was initially chosen for studies because it is the same frequency used for chemical fungicide treatment. It is clear from both studies that UV is effective for controlling PM at once per week, but what looks very promising is the gain in effectiveness at higher treatment frequencies that far surpasses chemical fungicide performance. Higher frequency is strictly a labor/logistical issue where costs can be reduced by scale and automation. Progress against Objectives I, II and III: We have developed a number of work products (listed in the following section), that included presentations made to growers, co-authorship of publications, as well as instructions to build UV-C systems on farm and instructions for their quantification and safe operation These kits have been successfully used by growers on farms that have no prior experience in lighting design and construction The results were recorded and analyzed to educate the community in comparison to the best in class uses of fungicide The majority of the outreach efforts have been completed.
Publications
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2020
Citation:
Mello, P., Onofre, R.B., Lopes, U. 2020. Evaluation of Ultraviolet Light for Suppression of Botrytis Fruit Rot (Botrytis cinerea) in vitro, in open-field production, and post-harvest. Plant Health 2020 APS Annual Meeting. https://apsnet.confex.com/apsnet/2020/meetingapp.cgi/Paper/16929
Onofre, R.B. 2020. Alternative Strategies for Management of Strawberry Powdery Mildew. Doctoral Exit Seminar at University of Florida. July 2020.
Onofre, R.B, et al. Use of Ultraviolet Light to Suppress Powdery Mildew in Strawberry Fruit Production Fields . Accepted with revisions to Plant Disease Journal. (In press)
Dr. Peres is refining a draft paper summarizing the results at California and Florida sites.
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Progress 09/01/18 to 08/31/19
Outputs
Target Audience:Strawberry growers, extension agents, crop consultants, lighting manufacturers. Changes/Problems:The work in CA with Driscoll's was front-loaded compared to the originally planned project. Therefore, more labor was dedicated to accomplish this at a faster rate. Otherwise, $18,000 of funds originally dedicated to a UV-spectroradiometer were re-allocated for other equipment and labor as required by the project. It was determined that this piece of equipment was no longer needed, as we were able to procure via use of other funds. Award funds were delayed and did not arrive at Cornell until June of 2019, hence the growing season in much of the project research area (FL and CA) and specifically NY was already underway (NY and CA) or over (FL). Decisions on recruiting of undergraduate research scholars are made during February-March, hence the selection of undergraduate researchers to work under this project will now be shifted to year 2 of the project. No significant changes in scope to report. What opportunities for training and professional development has the project provided?The following summarizes high level progress up till August 30, 2019. At the University of Florida, one undergraduate student intern and one graduate student are involved and have been provided training from the project. How have the results been disseminated to communities of interest?Results of research on UV have been disseminated by the many presentations and press releases listed under 'Products' as part of Objective I. Results from the field trials are not yet available as trials are currently under way. What do you plan to do during the next reporting period to accomplish the goals?The design and construction of the device for UV applications in FL is currently under way. Strawberry fields will be planted at the beginning of October and UV applications will start in mid- November and continue until February. We also hope to optimize the procedure to achieve even greater efficacy. Currently, the results suggest that our UV approach can be as good as the best in class fungicide application.
Impacts
What was accomplished under these goals?
The following summarizes high level progress up till August 30, 2019. A device for UV application was successfully built with a strawberry grower in CA. The field trial is currently under way with the treatments originally proposed and disease incidence and severity are being assessed at 7- day intervals by Driscoll's personnel. Disease assessments were coordinated with Co-PDs Peres and Gadoury. Kelly Ivors of Driscoll has also been a critical collaborator to evaluate the disease severity, conduct experiments and perform statistical analysis in the CA trials. Progress against Objectives I, II and III: We have developed a number of work products (listed in the following section), that included presentations made to growers, co-authorship of publications, as well as instructions to build UV-C systems on farm and instructions for their quantification and safe operation These kits have been successfully used growers on farm that have no prior experience in lighting design and construction The results are being recorded and analyze to educate the community in comparison to the best in class uses of fungicide
Publications
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2019
Citation:
Gadoury. D.M. 2019. The Potential of Light Treatments to Suppress Certain Plant Pathogens and Pests. Appellation Cornell. Research Focus 2019-3:1-7. (10%)
Stensvand, A., Suthaparan, A., Asalf, B., Pathak, R., Gisler�d, H.R., Solhaug, K.A., From, P., Onofre, R., Peres, N., Turechek, W., Bierman, A., Rea, M., Cadle Davidson, L., Gadoury, D.M. 2019. Alternative means to control powdery mildews. 51st Congress of the Southern African Society for Plant Pathology, Langebaan, South Africa, January 20 23, 2019. Book of Abstracts, p. 88. (10%)
Onofre, R.B., Gadoury, D.M., Stensvand, A., Rea, M., Bierman, A., and Peres, N. 2019. Evaluation of UVC for suppression of powdery mildew and other diseases in open field strawberry production. Phytopathology 109:0000 (in press). (10%)
Peres, N.A., Turechek, W., Gadoury, D.M., Stensvand, A. & Schnabel, G. 2019. Strategic management of multiple diseases in strawberry nurseries and production fields. 9th North American Strawberry Symposium. Orlando, Florida, February 3 6, 2019. Book of abstracts, p. 11. (10%)
Gadoury, D.M., Bierman, A., Rea, M., Stensvand, A., Suthaparan, A., Onofre, R.B. & Peres, N.A. 2019. Design and operational considerations for use of ultraviolet light for disease and pest suppression under field conditions. 9th North American Strawberry Symposium. Orlando, Florida, February 3 6, 2019. Book of abstracts, p. 15. (10%)
Stensvand, A., Suthaparan, A., Asalf, B., Pathak, R., Gisler�d, H.R., Solhaug, K.A., From, P., Onofre, R., Peres, N.A., Turechek, W., Bierman, A., Rea, M., Cadle-Davidson, L. and Gadoury, D.M. 2019. Non-chemical control of powdery mildew in strawberry. 9th North American Strawberry Symposium. Orlando, Florida, February 3 6, 2019. Book of abstracts, p. 16. (10%)
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