Evaluation of Cotton Jassid Control by On-Farm Insecticide Trials in Georgia
Applied Research
Jacob Kalina
County Extension Agent - Brooks County
University of Georgia
Quitman
Abstract
Evaluation of Cotton Jassid Control by On-Farm Insecticide Trials in Georgia
Kalina * J.R.1, Brown W.S.2, Kichler J.M.3, Williams Z.S.4, Wilson T.B.5, Hand L.C.6, Roberts P.M.7
1 County Extension Agent, University of Georgia, Brooks County, Georgia
2 County Extension Agent, University of Georgia, Appling County, Georgia
3 County Extension Coordinator, University of Georgia, Colquitt County, Georgia
4 County Extension Coordinator, University of Georgia, Bacon County, Georgia
5 County Extension Educator, University of Georgia, Colquitt County, Georgia
6 Extension Cotton Specialist, University of Georgia, Tifton, Georgia
7 Extension Cotton Entomologist, University of Georgia, Tifton, Georgia
The purpose of this research was to develop control strategies for the Cotton Jassid (Amrasca biguttula), or two-spotted cotton leaf hopper. When the damage potential of this invasive insect became apparent the only recommendation that was shown to work was Bidrin. Due to lack of data on this emergent pest, University of Georgia Extension arranged research trials at UGA research station and on farm in several counties, including Brooks. In Brooks County two trials were conducted at a farm location with a high infestation, one small plot and one large strip trial. A total of 9 insecticides were evaluated at this location, and data were collected by adult and nymph counts per 25 leaves at 4, 7, and 14 Days after treatment (DAT). At 4 DAT, in the small plot trial, Bidrin (79%), Centric (71%), Carbine (84%), and Sivanto (80%) stood out. The three insecticides evaluated in the strip trial all preformed well. At 4 DAT the control levels were: Bidrin 96%, Argyle 87%, and Centric 91%. Yield differences were observed at up to 400 lbs/a higher than the non-treated. These trials provide growers with the most up to date information for management of this emergent invasive pest.
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Authors: Jacob Kalina
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Kalina, J. County Extension Agent - Brooks County, University of Georgia Extension, Georgia, 31643