Terminating Insecticides in Cotton

Angus Catchot, Extension Entomologist
By Angus Catchot, Extension Entomologist, Jeff Gore, Research and Extension Entomologist, Don Cook, Research Entomologist and Darrin Dodds, Extension Cotton Specialist August 30, 2013 14:16

Terminating Insecticides in Cotton

I have looked at several fields over the last couple weeks that should be considered safe from yield loss from insect pest. Keep in mind that termination rules for insects in cotton do not mean the crop is “bug proof” but rather that there is no economic justification for treating.  Dr. Scott Stewart at the University of Tennessee does a great job summarizing termination rules in the following article.

http://news.utcrops.com/2013/08/cotton-insecticide-termination-defoliation-and-weather-rules/

The Weather Channel actually has an easy function to calculate DD60’s. You can go to www.weather.com , click on “weather” at the top left, then on “farming”, then enter the city you are interested in, next click on “growing degree day calculator” on the left side bar, change the base temperature to 60 degrees and enter whatever dates you want to know about. It will also give you the 5 year average. Below is picture of the page.

Click to enlarge.

weather channel dd60

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Angus Catchot, Extension Entomologist
By Angus Catchot, Extension Entomologist, Jeff Gore, Research and Extension Entomologist, Don Cook, Research Entomologist and Darrin Dodds, Extension Cotton Specialist August 30, 2013 14:16
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