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Syngenta Field Report

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The Syngenta Field Report features information and experts from Syngenta sharing observations about issues growers are dealing with in the fields.

Corn nematode threat growing in Midwest

Aug 11, 2009
Changing production practices are escalating corn nematode populations. These microscopic, thread-like round worms are an increasing threat to top-quality corn production.
 
Some plant parasitic nematodes are sensitive to soil disturbance, so the increase in no-till acres has created a more hospitable environment. Corn-on-corn production gives nematodes the resources to thrive year after year. And, switching to insect-resistant corn and pyrethroid insecticides has moved growers away from using organophosphate and carbamate insecticides, which provided some suppression of nematodes.
 
Corn nematodes have been found in every major corn-growing county in the U.S. These maps show the risk levels for nematode pressure in the Midwest and South.

Root-knot Nematode Distribution in the U.S. (South)
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