The new version of Vegetable Production Guide for Commercial Growers, 2020-21 (ID-36) is now available as a PDF online and is on its way to county Extension offices Commonwealth-wide. Here is a summary of the major disease management-related changes from previous versions:
Appendix F: Significant expansion has occurred in the number of generic fungicides available for use in vegetables. With a number of fungicidal modes of action coming off-patent, there are also several new pre-mix fungicide options combining protectant and systemic chemistries, or multiple systemic chemistries with different modes of action.
Pg. 13: Complete fungicide listing by Fungicide Resistance Action Committee Code (FRAC), Active Ingredient, and Chemical Group.
Pg. 18: Updated greenhouse fungicides list. A few new fungicides are labeled, and clarifications on use patterns are indicated for some fungicides in comments.
Throughout: New fungicides have been input in the crop- and disease-specific sections throughout the guide. Always review current product labels prior to applying any crop protectant, as labels change frequently and without announcement.
Appendix E: Fumigants for Vegetable Crops have been moved to the appendix, as these are used fairly infrequently.
By Emily Pfeufer, Extension Plant Pathologist