The majority of New York’s winter wheat crop is now or soon will be flowering. This is the decision time for application of an efficacious triazole fungicide (i.e., Caramba, Prosaro, or Proline) for suppression of FHB and control of fungal diseases on flag leaves. A flowering application of triazole fungicide should be based on Fusarium head blight (FHB) risk as well as the risks of powdery mildew, rust, and fungal leaf blotches in the upper canopy based on scouting of individual fields. The FHB Risk Assessment Tool indicates low risk for FHB infection throughout the state. Forecasts for the next several days predict warm temperatures and a continuing chance of scattered thunderstorms, but not long durations of leaf wetness. Check the Risk Assessment Tool and your local weather forecast frequently during this critical window of wheat development. And be aware of the 30 days to harvest restriction for the application of triazole fungicides.
–Gary Bergstrom, Extension Plant Pathologist, Cornell University
For more details, go to the FHB Risk Assessment Tool at http://www.wheatscab.psu.edu/riskTool_2012.html
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To see past blog entries for this region: http://scabusa.org/modules/wordpress/index.php/category/northern-sww-region
