Progress 08/01/12 to 03/30/17
Outputs
Target Audience:Peanut and pecan growers across the southeast who are trying to remain competitive in expanding world markets. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?We had an annual field day at the SE Gin and Peanut site in Surrency, GA where local farmers could see the results of the various input levels on peanut production, and also had several field days on the Tifton campus for various commodity and grower groups. County agents and industry professionals frequently visited our trials and the data was used extensively to draft disease control recommendations. How have the results been disseminated to communities of interest?Refereed publications have been completed and the information incorporated into UGA extension service publications, particularly the UGA Peanut Disease Risk Index which is used extensively by growers. Jordan, B. S., Culbreath, A. K., Brenneman, T. B., Kemerait, R. C., & Branch, W. D. (2017). Leaf spot severity and yield of new peanut breeding lines and cultivars grown without fungicides. Plant Disease, 101, 1843-1850 Holbrook, C. C., Ozias-Akins, P., Chu, Y., Culbreath, A. K., Kvien, C. K., & Brenneman, T. B. (2017). Registration of 'TifNV-High O/L' Peanut. JOURNAL OF PLANT REGISTRATIONS, 11(3), 228-230. doi:10.3198/jpr2016.10.0059crc Branch, W. D., Brenneman, T. B., & Noe, J. P. (2016). Evidence for a second RKN resistance gene in peanut. Peanut Science, 43(1), 49-51. Jogi, A., Kerry, J. W., Brenneman, T. B., Leebens-Mack, J. H., & Gold, S. E. (2016). Identification of genes differentially expressed during early interactions between the stem rot fungus (Sclerotium rolfsii) and peanut (Arachis hypogaea) cultivars with increasing disease resistance levels. Microbiological Research, 184, 1-12. Branch, W. D., & Brenneman, T. B. (2015). Stem rot (white mold) and Tomato spotted wilt resistance among peanut genotypes. Peanut Science, 42(1), 18-22. Branch, W. D., Brenneman, T. B., & Hookstra, G. (2014). Field test results versus marker assisted selection for root-knot nematode resistance in peanut. Peanut Science, 41(2), 85-89. Woodward, J. E., Brenneman, T. B., Kemerait Jr, R. C., Culbreath, A. K., & Smith, N. B. (2014). On-farm evaluations of reduced input fungicide programs in peanut fields with low, moderate, or high levels of disease risk. Peanut Science, 41(1), 50-57. What do you plan to do during the next reporting period to accomplish the goals?This is the final report on this project.
Impacts
What was accomplished under these goals?
Considerable progress was made during the course of this project in understanding the epidemiology of several major peanut and pecan diseases and improving disease management. On anthracnose we now know the timing of infection and how symptom expression is delayed, thus influencing timing of fungicides. Tremendous progress was made understanding the nature and distribution of fungicide resistance in pecan scab. This is a huge issue threatening management programs which now rely heavily on use of fungicides. In our peanut project we made good progress toward developing even better sources of disease resistance to stem rot and nematodes by identifying genes associated with resistance and phenotyping crosses to select for resistant entries. This resulted in the release of TifNV-HiOL which will have a big impact on nematode management in peanut. Fungicide programs have been improved and the Disease Risk Index refined to give growers even more confidence in using it to help reduce fungicide costs. Fungicides are one of the biggest expenses in the budget for both peanut and pecan growers, and these results will help minimize those costs in the years ahead.
Publications
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Progress 10/01/16 to 03/30/17
Outputs
Target Audience:Peanut and pecan growers across the southeast who are trying to remain competitive in expanding world markets. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?We had a field day at the SE Gin and Peanut site in Surrency, GA where local farmers could see the results of the various input levels on peanut production, and also had several field days on the Tifton campus for various commodity and grower groups. How have the results been disseminated to communities of interest?Refereed publications have been completed and the information incorporated into UGA extension service publications, particularly the UGA Peanut Disease Risk Index which is used extensively by growers. What do you plan to do during the next reporting period to accomplish the goals?Expand on these efforts.
Impacts
What was accomplished under these goals?
Considerable progress was made this year in improving our understanding of pecan disease management, specifically anthracnose and pecan scab. There are emerging issues with fungicide resistance that need to be addressed, but greater the biology of fungicide resistance in pecan scab. This is a huge issue threatening management programs which rely heavily on use of fungicides. In our peanut project we made good progress toward developing even better sources of disease resistance to stem rot by identifying specific genes associated with resistance that can be used in further breeding efforts. This included release of a new cultivar that is highly resistant to root knot nematodes, and further work showing management options with reduced fungicide inputs on resistant peanut cultivars.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2017
Citation:
Holbrook, C. C., Ozias-Akins, P., Chu, Y., Culbreath, A. K., Kvien, C. K., & Brenneman, T. B. (2017). Registration of TifNV-High O/L Peanut. JOURNAL OF PLANT REGISTRATIONS, 11(3), 228-230. doi:10.3198/jpr2016.10.0059crc
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Progress 10/01/15 to 09/30/16
Outputs
Target Audience:Peanut and pecan growers across the southeast who are trying to remain competitive in expanding world markets. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?We had a field day at the SE Gin and Peanut site in Surrency, GA where local farmers could see the results of the various input levels on peanut production, and also had several field days on the Tifton campus for various commodity and grower groups. How have the results been disseminated to communities of interest?Refereed publications have been completed and the information incorporated into UGA extension service publications, particularly the UGA Peanut Disease Risk Index which is used extensively by growers. What do you plan to do during the next reporting period to accomplish the goals?Expand on these efforts.
Impacts
What was accomplished under these goals?
Considerable progress was made this year in improving our understanding of pecan disease management, specifically anthracnose and pecan scab. There are emerging issues with fungicide resistance that need to be addressed, but greater utilization of the phosphite chemistry has helped tremendously, especially during prepollination. Our work documenting residues will help insure that this chemistry will be available to growers in the future. In our peanut project we made good progress toward developing even better sources of disease resistance to stem rot by identifying specific genes associated with resistance that can be used in further breeding efforts.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2016
Citation:
Branch, W. D., Brenneman, T. B., & Noe, J. P. (2016). Evidence for a second RKN resistance gene in peanut. Peanut Science, 43(1), 49-51.
- Type:
Journal Articles
Status:
Published
Year Published:
2016
Citation:
Jogi, A., Kerry, J. W., Brenneman, T. B., Leebens-Mack, J. H., & Gold, S. E. (2016). Identification of genes differentially expressed during early interactions between the stem rot fungus (Sclerotium rolfsii) and peanut (Arachis hypogaea) cultivars with increasing disease resistance levels. Microbiological Research, 184, 1-12.
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Progress 10/01/14 to 09/30/15
Outputs
Target Audience:Peanut and pecan growers across the southeast who are trying to remain competitive in expanding world markets. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?We had a field day at the SE Gin and Peanut site in Surrency, GA where local farmers could see the results of the various input levels on peanut production, and also had several field days on the Tifton campus for various commodity and grower groups. How have the results been disseminated to communities of interest?Refereed publications have been completed and the information incorporated into UGA extension service publications, particularly the UGA Peanut Disease Risk Index which is used extensively by growers. What do you plan to do during the next reporting period to accomplish the goals?Expand on these efforts.
Impacts
What was accomplished under these goals?
Two major goals were achieved. First, additional data was developed showing the benefits of reduced fungicide inputs were clearly demonstrated in actual on-farm trials, complete with an economic analysis and different levels of input applied to situations with various levels of risk. This provided good validation for the disease risk index. In our other project we made good progress toward developing even better sources of nematode and disease resistance to diseases and nematodes.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2015
Citation:
Branch, W. D., & Brenneman, T. B. (2015). Stem rot (white mold) and Tomato spotted wilt resistance among peanut genotypes. Peanut Science, 42(1), 18-22.
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Progress 10/01/13 to 09/30/14
Outputs
Target Audience:Peanut and pecan growers across the southeast who are trying to remain competitive in expanding world markets. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?We had a field day at the SE Gin and Peanut site in Surrency, GA where local farmers could see the results of the various input levels on peanut production. How have the results been disseminated to communities of interest?Refereed publications have been completed and the information incorporated into UGA extension service publications, particularly the UGA Peanut Disease Risk Index which is used extensively by growers. What do you plan to do during the next reporting period to accomplish the goals?Expand on these efforts.
Impacts
What was accomplished under these goals?
Two major goals were achieved. First, the benefits of reduced fungicide inputs were clearly demonstrated in actual on-farm trials, complete with an economic analysis and different levels of input applied to situations with various levels of risk. This provided good validation for the disease risk index. In our other project we demonstrated strengths and potential weaknesses in the use of molecular markers for selecting resistance to peanut root knot nematodes. This technology holds great potential, but is not fool-proof, and the limitations need to be recognized.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2014
Citation:
Branch, W. D., Brenneman, T. B., & Hookstra, G. (2014). Field test results versus marker assisted selection for root-knot nematode resistance in peanut. Peanut Science, 41(2), 85-89.
- Type:
Journal Articles
Status:
Published
Year Published:
2014
Citation:
Woodward, J. E., Brenneman, T. B., Kemerait Jr, R. C., Culbreath, A. K., & Smith, N. B. (2014). On-farm evaluations of reduced input fungicide programs in peanut fields with low, moderate, or high levels of disease risk. Peanut Science, 41(1), 50-57.
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Progress 01/01/13 to 09/30/13
Outputs
Target Audience:Peanut and pecan growers across the southeast who are trying to remain competitive in expanding world markets. Changes/Problems:No major changes anticipated What opportunities for training and professional development has the project provided?We had a field day at the SE Gin and Peanut site in Surrency, GA where local farmers could see the resuls of the various input levels on peanut production. How have the results been disseminated to communities of interest?Refreed publications have been completed and the information incorporated into UGA extension service publications, particularly the UGA Peanut Disease Risk Index which is used extensively by growers. What do you plan to do during the next reporting period to accomplish the goals?Expand on these efforts.
Impacts
What was accomplished under these goals?
Two major goals were achieved. First, the benefits of reduced fungicide inputs were clearly demonstrated in actual on-farm trials, complete with an economic analysis and different levels of input applied to situations with various levels of risk. This provided good validation for the disease risk index. In our other project we demonstrated strenghts and potential weaknesses in the use of molecular markers fr selecting resistance to peanut root knot nematodes. This technology holds great potential, but is not fool-proof, and the limitations need to be recognized.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2014
Citation:
Branch, W. D., Brenneman, T. B., & Hookstra, G. (2014). Field test results versus marker assisted selection for root-knot nematode resistance in peanut. Peanut Science, 41(2), 85-89.
- Type:
Journal Articles
Status:
Published
Year Published:
2014
Citation:
Woodward, J. E., Brenneman, T. B., Kemerait Jr, R. C., Culbreath, A. K., & Smith, N. B. (2014). On-farm evaluations of reduced input fungicide programs in peanut fields with low, moderate, or high levels of disease risk. Peanut Science, 41(1), 50-57.
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Progress 01/01/12 to 12/31/12
Outputs
OUTPUTS: Current research on improved management of soilborne peanut diseases is being disseminated via production meetings organized by the University of Georgia Cooperative Extension Service in every Georgia peanut producing county. Presentations have also been made at field days in Georgia, Florida and South Carolina with field trials exhibitng the the production practices discussed. Numerous aricles have also been printed in the farm media discussing disease control options, as well as radio spots on local stations. PARTICIPANTS: Nothing significant to report during this reporting period. TARGET AUDIENCES: Peanut and pecan farmers as well as anyone interested in pecan truffles can benefit from this work. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
Increased knowledge of soilborne disease development in peanuts resulted in improved management on the part of growers. Recent work regarding use of early season, banded fungicide sprays to prevent white mold have been validated on-farm in grower trials and are showing significant yield enhancement due to more consistent disease control. Research on pecan truffles (Tuber lyonii) is also being utilized as commercial dog trainers are training and selling dogs to harvest truffles. The first truffles were harvested this year from artificially inoculated trees, demonstrating that this can be done, and openning the door for commercial production of inoculated trees. Initial studies on how to do this on a larger scale are under way.
Publications
- Clive H. Bock, Tim B. Brenneman, Michael W. Hotchkiss and Bruce W. Wood (2012). Evaluation of a phosphite fungicide to control pecan scab in the southeastern USA. Crop Protection 36: 58-64.
- Branch, W. D., and Brenneman, T. B. (2012). New sources of Cylindrocladium black rot resistance among runner-type peanut cultivars. Peanut Science 39:38-42.
- Bonito G, Smith M, Brenneman T, and Vilgalys R.( 2012). Assessing ectomycorrhizal fungal spore banks of truffle producing soils with pecan seedling trap-plants. Plant and Soil. 356:357-366.
- Augusto, J., and Brenneman, T. B (2012). The interactive effects of fungicide, application timing and spray volume on peanut diseases and yield. Plant Health Progress doi:10.1094/PHP-2010-0420-01-RS.
- Woodward, J. E., Brenneman, T. B. and Mullinix, B. G, Jr 2012. Irrigation Timing Impacts the Efficacy of Foliar-Applied Fungicides Toward Foliar and Soilborne Pathogens of Peanut. Plant Disease, December 2012, Volume 96, Number 12 , Pages 1785-1790 (doi: http://dx.doi.org/10.1094/PDIS-01-12-0042-RE)
- Augusto, J., and Brenneman, T. B (2012). Assessing systemicity of peanut fungicides through bioassay of plant tissues with Sclerotium rolfsii. Plant Disease 96:330-337. doi.org/10.1094/PDIS-04-11-0303.
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