Friday, August 13, 2010

Local Corn Earworm Populations Again Demonstrating High Levels Of Pyrethroid Resistance

Dr. Ames Herbert, Extension Entomologist, mentioned in his July 29, 2010, advisory that we are continuing to monitor for pyrethroid resistance in corn earworm.

We have now tested over 1,500 moths and are averaging 28% survival in the 5 ug cypermethrin vials (see the data by clicking here).

This is now the third consecutive year that local corn earworm populations are demonstrating high levels of pyrethroid resistance. As Dr. Herbert said in his advisory, proceed with caution and consider non-pyrethroids especially in peanut or soybean fields with a lot of worms.

- From Sean Malone, Tidewater Agricultural Research

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