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Fungicide "Cheat Sheet" for ALS and Head Rot in Broccoli and Other Cole Crops

Christy Hoepting, Extension Vegetable Specialist
Cornell Vegetable Program

Last Modified: August 6, 2025

Fungicide "Cheat Sheet" for ALS and Head Rot in Broccoli and Other Cole Crops

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.

==> Due to lack of funding, we were unable to continue our research on Alternaria leaf spot and head rot in broccoli in 2024 or 2025. Thus, our recommendations for control of this disease remain the same.



Fungicide Cheat Sheet for ALS and Head Rot in Broccoli & Other Cole Crops, 2024 (pdf; 348KB)

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Upcoming Events

Good Agricultural Practices (GAPs) Food Safety Training

March 10, 2026
Newark, NY

Learn about food safety on the farm! This event hosted by the Cornell Vegetable Program, Cornell Lake Ontario Fruit Team, CCE Wayne County, and the NYS Department of Agriculture, will cover good agricultural practices (GAPs) to help reduce the risk of microbial contamination on the farm, keeping food and consumers safe.

View Good Agricultural Practices (GAPs) Food Safety Training Details

Urban Ag Food Safety Webinar

March 11, 2026

Urban and small-scale producers are encouraged to join us for the Urban Ag Food Safety webinar, featuring speakers from Cornell Cooperative Extension and Cornell IPM. We will explore the 'why' behind food safety, providing a basic overview and diving into specific urban ag considerations including water, pest, rodent, and soil health challenges. We will touch on the regulation and marketing landscape, and share resources for learning more. Bring your questions!

View Urban Ag Food Safety Webinar Details

2026 NYS Processing Vegetable Educational Meeting

Event Offers DEC Credits

March 16, 2026
Batavia, NY

Processing vegetable industry members who grow, manage, or support crop production for Farm Fresh First/Nortera Foods, Seneca Foods and/or Love Beets, are encouraged to sign-up for the 2026 NYS Processing Vegetable Industry Meeting! You will:

  • Network at this in-person meeting.
  • Learn the results of industry-funded research.
  • Have a voice in Cornell research and Extension.

DEC recertification credits available: 2.0 in categories 1a, 10, and 23.

2.0 Certified Crop Advisor (CCA) credits available.

View 2026 NYS Processing Vegetable Educational Meeting Details

Announcements

2025 Year in Review

Our 2025 Year in Review and 2026 Preview report highlights some of the many research and educational programs led by our team in 2025. Plus, we provide a sneak peek at some of our plans for 2026!
  • Integrating Laser Weeders into Muck Onion Production
  • Cornell Vegetable Program Advances Cover Crop Research
  • New, Interactive Pesticide Safety Programming Protects Farmer Health
  • Specialty Potato Variety Trial Tests Varieties During a Hot Growing Season
  • Mushroom Enthusiasm Grows
  • Equipping Sweet Corn Growers for an Emerging Disease: Tar Spot
  • Farm Food Safety Educational Outreach
  • Sustainable Pest Management for New York Urban Farmers
  • In 2026...


Cornell Crop and Pest Management Guidelines Paused

From Cornell IPM:

Highlighting its commitment to quality and long-term sustainability, Cornell Integrated Pest Management's Pesticide Safety Education Program has announced a pause in production of the 2026 Cornell Crop and Pest Management Guidelines.

Cornell IPM Director Alejandro Calixto said this temporary measure is the result of a comprehensive reimagining process facilitated by Illume Projects of Ithaca, which included end-user interviews, internal surveys and sales data analytics.

"It became clear to us that we cannot continue producing the guidelines and fully restructure them at the same time," Calixto said. "By pausing production, we can dedicate all available resources and time to rebuilding the production process, ensuring that when we re-launch in 2027, the guidelines will reflect a modernized approach built around the grower and other user experience."

A series of annually updated reference manuals produced by Cornell IPM and the College of Agriculture and Life Sciences (CALS), the Cornell Crop and Pest Management Guidelines are widely used by farmers, agronomists, crop consultants and extension educators in New York and throughout the Northeast. They include information about current IPM recommendations, pesticide options, cultural practices, nutrient management, disease, insect and weed identification and resistance-management strategies.

Calixto and Pesticide Safety Education Program Lead Mike Helms will spearhead efforts to restructure the guideline process over the next 12 months, with a goal of launching a more streamlined, user-friendly version in 2027.

Limited copies of the 2025 guidelines remain available for purchase while supplies last through The Cornell Store. The 2026-2027 Greenhouse Guidelines will be available.

For more information contact Helms at mjh14@cornell.edu.


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