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Copper Fungicides for Organic Disease Management in Vegetables

September 16, 2013

Copper Fungicides for Organic Disease Management in Vegetables
From Margaret McGrath, Department of Plant Pathology and Plant-Microbe Biology, Cornell:

There are several different copper fungicides approved for use in organically-produced crops. Copper fungicides are important tools for managing diseases that cannot be effectively managed with cultural practices alone. They have broad-spectrum activity, acting on bacteria as well as fungi. Following many years of use, there is a lot more information on efficacy of copper fungicides than the newer biological products. Manufacturers of some biologicals recommend that they be used in a management program with copper fungicides (often in alternation or at low label rate). Thus it appears copper fungicides will continue to be important for managing diseases. Copper fungicides differ in their active ingredient, use rate, re-entry interval, and the amount of copper. Copper is an inorganic compound thus it does not breakdown like organic compounds and consequently copper can accumulate in soil when used intensively. Plants take up some copper from soil because it is a micronutrient. Similarly, humans need a small amount of copper in their diets. Metallic copper equivalent (MCE) is a commonly used measure of the quantity of copper in fungicides.

Click here for a chart on the Highest Label Rate of Organic Copper Fungicides for Some Vegetable Crops.

The specific directions on fungicide labels must be adhered to. They supersede these recommendations (above), if there is a conflict. Check state registration and organic approval before using a product. Any reference to commercial products, trade or brand names is for information only; no endorsement is intended.


Highest Label Rate of Organic Copper Fungicides for Some Vegetable Crops (pdf; 198KB)

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Upcoming Events

Food Safety and Wash/Pack Facilities: Virtual Training

November 16, 2020

A well-thought out Wash/Pack Facility can go a long way in improving produce quality, worker health and safety, and overall efficiency. But how can intentional design impact food safety? This virtual training will help farmers and workers understand the food safety risks present in wash/pack facilities and outline ways in which risks can be minimized.

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Announcements

NY Agrivoltaic Development Assistance Project

Agrivoltaic systems combine production of solar energy and agriculture by planting crops, forage, and/or plants for pollinators and other beneficial insects underneath solar panels. Like conventional solar photovoltaic (PV) projects, agrivoltaic systems can reduce farm energy expenses and provide a hedge against increases in electricity prices.

The New York Agrivoltaic Development Assistance Program is providing free agrivoltaic system assessments to a select number of farmers in New York State. We will provide an unbiased, third-party assessment to evaluate the viability and benefits of installing an agrivoltaics system at your farm. Based on the needs and interests of your farm, we will work with you to determine the optimal agrivoltaics system for your business.

Your agrivoltaic assessment can be used to support a USDA Rural Energy America Program (REAP) application, which provides grants covering up to 25% of eligible project costs, and loan guarantees on loans up to 75% of total eligible project costs.

To request an application or learn more about how agrivoltaics may benefit your farm, reach out to Emma Kubinski at (585) 737-2070 or send an email. This program is offered on a first-come, first-served basis and funding is limited. Apply now to reserve your spot!

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