University of Maryland Extension

2016 Fungicide Resistance Management Guidelines Available

Dr. Kathryne Everts

The Fungicide Resistance Action Committee (FRAC) has released the 10th Edition of the guide, the Fungicide Resistance Management Guidelines for Vegetable Crops Grown in the Mid-Atlantic Region for 2016.

Since 2007, over 20,000 FRAC guides have been distributed in the mid-Atlantic and surrounding region, representing over 100,000 A of vegetable production.

In the mid-Atlantic region (NJ, MD, VA, DE, PA) of the United States approximately 221, 000 A of fresh-market and processing vegetable crops are grown each year. Over the past decade, a number of new fungicide chemistries for use in vegetable production have been released in the United States. Many of these fungicides have specific modes-of-action (MOA) that target pathogen development at a single site. Fungicides with a single-site MOA are often considered at- or high-risk fungicides because the chances for fungal resistance to develop are much higher than fungicides with multiple MOA’s. In recent years, fungicide resistance has developed in important diseases such as powdery mildew in cucurbits and phytophthora in pepper.

To view the guide, select the link below.

Andy Wyenandt, Pathologist, Rutgers University
Nathan Kleczewski, Extension Plant Pathologist, University of Delaware
Kathryne L. Everts, Extension Vegetable Pathologist, University of Maryland
Steven L. Rideout, Extension Vegetable Pathologist, Virginia Tech
Beth K. Gugino, Extension Vegetable Pathologist, Penn State

Mahfuz Rhman, Extension Plant Pathologist, West Virginia University

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