Fungicide "Cheat Sheet" for ALS and Head Rot in Broccoli and Other Cole Crops
Christy Hoepting, Extension Vegetable Specialist
Cornell Vegetable Program

The 2024 updated Fungicide "Cheat Sheet" provides a list of fungicides (both conventional and organic) that are labeled in broccoli and other common Cole crops, for which Cornell research has shown to be effective for control of Alternaria leaf spot (ALS) and head rot. Many tips on how to build a successful fungicide program for ALS and downy mildew that adheres to best fungicide resistance management are included.
NOTE: Due to known development of ALS developing fungicide resistance to FRAC 7c, Cornell is not longer recommending FRAC 7 fungicides for managing ALS and head rot in brassicas.
Fungicide Cheat Sheet for ALS and Head Rot in Broccoli & Other Cole Crops, 2024 (pdf; 348KB)


Upcoming Events
Vegetable Pest and Cultural Management Field Meeting for Auction Growers -- Finger Lakes Produce Auction

July 18, 2025
Penn Yan, NY
This evening meeting will demonstrate pest management in fresh market vegetables in both field and greenhouse (high tunnel) vegetables, primarily for those growing for wholesale auction. A hands-on demonstration of weed, insect and disease identification in vegetables including management options. Details on each topic will focus on field observations at the farm.
Lake Erie Region Summer Meeting

July 24, 2025
Brant, NY
This meeting will cover organic and conventional management and will be relevant for producers of all sizes. This broad-reaching meeting will feature a mixed fresh market field walk, potatoes, sprayer calibration, and disease control in table and wine grapes. We'll cover organic and conventional controls and present information for growers of all scales of production.
2.0 DEC (0.5 CORE, 1.0 Veg, 0.5 Fruit)
Vegetable Pest and Cultural Management Field Meeting for Auction Growers -- Seneca Produce Auction

July 30, 2025
Romulus, NY
This evening meeting will demonstrate pest management in fresh market vegetables in both field and greenhouse (high tunnel) vegetables, primarily for those growing for wholesale auction. A hands-on demonstration of weed, insect and disease identification in vegetables including management options. Details on each topic will focus on field observations at the farm.
2.0 DEC credits in categories 10, 1a, 23, and 24.