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Afla-Guard also protects corn crops
Date:9/3/2010

This release is available in Spanish.

Afla-Guard, a biological control used to thwart the growth of fungi on peanuts, can be used on corn as well, according to a study by U.S. Department of Agriculture (USDA) scientists who helped develop it.

After extensive study and research trials in Texas, Afla-Guard was registered by the U.S. Environmental Protection Agency (EPA) for use on corn, beginning with the 2009 crop.

Recently retired Agricultural Research Service (ARS) microbiologist Joe Dorner at the National Peanut Research Laboratory in Dawson, Ga., helped develop Afla-Guard, a biological control for the aflatoxin-producing fungi Aspergillus flavus and A. parasiticus in peanuts. ARS is USDA's principal intramural scientific research agency.

A. flavus and A. parasiticus, naturally-occurring soil fungi, can invade food and feed crops, contaminating them with aflatoxin. Aflatoxin is a human carcinogen produced by the fungi and is also toxic to pets, livestock, and wildlife.

Afla-Guard is composed of hulled barley coated with spores of a nontoxic strain of A. flavus. The nontoxic Aspergillus fungi successfully compete against the toxic species for the limited space and nutrients each needs to grow and thrive. In peanuts, Afla-Guard reduced aflatoxins by an average of 85 percent in farmers' stock peanuts and up to 97 percent in shelled, edible-grade peanuts.

In light of this success, Dorner and other ARS scientists conducted a two-year study of Afla-Guard in corn. They again found that it was effective in reducing aflatoxin levelsshowing an overall reduction of 85 percent, when compared to control fields.

Afla-Guard was applied to the corn crop in different ways: to soil when corn was less than a meter tall, in plant whorls prior to tassel formation, and as multiple sprays during silking.


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Contact: Sharon Durham
sharon.durham@ars.usda.gov
301-504-1611
United States Department of Agriculture-Research, Education, and Economics
Source:Eurekalert

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