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Poster Presentations


Poster Presentations

Specialty legume crops and Asian soybean rust What will be affected and what are we doing about it?

Presenter: David C. Thompson, IR-4 Project, Rutgers University
Coauthor(s): Kent Smith,USDA ARS, Office of Pest Management Policy. Allen Straw, Virginia Polytechnic Institute. Charlie Clark, Florida Dept of Agriculture. Bob Moore, Florida Dept of Agriculture. Richard Raid, University of Florida. Craig Canaday, University of Tennessee. Ed Sikora, Auburn University. Charles Meister, IR-4 Project, University of Florida

A number of specialty legume crops are known to be capable of supporting sporulating lesions following infection with Phakopsora pachyrhizi, the causal agent of Asian soybean rust. Many of these crops have not been reported to sustain disease in the field; however, the potential for losses in specialty legume crops to Asian soybean rust has prompted a closer look at the disease control tools available. The main crops of concern appear to be beans and peas in EPA Crop Group 6, the foliage of those legume crops and legume crops in Crop Group 18, non-grass animal feeds. A review of current and pending registrations indicates that two strobilurin fungicides (azoxystrobin, pyraclostrobin) and three triazole fungicides (tebuconazole, propiconazole, myclobutanil) will be available for some of the susceptible crops in crop groups 6, 7 and 18 in the near future. A Section 18, quarantine exemption was developed by Florida and Tennessee for use by states in requesting use of tebuconazole, myclobutanil, propiconazole, propiconazole + trifloxystrobin, and propiconazole + azoxystrobin. The IR-4 Project has petitioned EPA for azoxystrobin tolerances on crop groups 6, 7 and 18 and initiated residue trials with propiconazole for use on edible-pod beans and succulent, shelled beans. Results of preliminary evaluation of some of these materials are described.

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