Adam Chappell, achappe@uark.edu, Tim Kring, tkring@uark.edu, and Gus Lorenz, glorenz@uaex.edu. University of Arkansas, Dept. of Entomology AGRI 321, Fayetteville, AR
The standard cotton aphid threshold used to make treatment decisions was modified to incorporate the presence of beneficial insects, particularly predaceous coccinellids. The new threshold relies on density estimates of coccinellids (adults and larvae) made by scouts at each field location where aphid samples are routinely taken. Preliminary work has shown application of the new threshold reduced insecticide applications by an average of one application per season. Current research is deploying this new threshold across eastern Arkansas.
Species 1: Homoptera Aphididae
Aphis gossypii (cotton aphid)
Species 2: Coleoptera Coccinellida
Hippodamia convergens (convergent lady beetle)
Keywords: economic threshold, biological control
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