Evaluation of PRE herbicide and seed treatment on thrips infestation and cotton growth, development, and yield

Monday, March 3, 2014: 10:42 AM
Columbia/Charleston (Embassy Suites Greenville Golf & Conference Center)
Drake Copeland , Plant Soil Science, Mississippi State University, Mississippi State, MS
Darrin Dodds , Plant and Soil Sciences, Mississippi State University, Mississippi State, MS
Tyler Dixon , Plant and Soil Sciences, Mississippi State University, Mississippi State, MS
D. Reynolds , Plant and Soil Sciences, Mississippi State University, Mississippi State, MS
Chase Samples , Plant and Soil Sciences, Mississippi State University, Mississippi State, MS
Angus Catchot , Dept. of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS
Jeff Gore , Delta Research and Extension Center, Mississippi State University, Stoneville, MS
Davie Wilson , Monsanto Company, Chesterfield, MO
Evaluation of PRE Herbicide and Seed Treatment on Thrips Infestation and Cotton Growth, Development, and Yield

J.Drake Copeland, D.M. Dodds, T.H. Dixon, D. Zachary Reynolds, C.A. Samples, A. Catchot, J. Gore, and D. Wilson

Since 2011, foliar treatments for thrips infestations in cotton have increased to nearly two applications per acre on 75% of total acres treated with an insecticidal seed treatment. Additionally, glyphosate-resistant Palmer amaranth has become problematic for Mississippi producers resulting in a dramatic increase in usage of preemergence herbicides since 2008. From 2008 to 2012 the number of cotton bales lost due to thrips damage increased from 152 bales lost in 2008 to 5,057 bales lost in 2012. In cotton, thrips damage and PRE herbicides interfere with emergence. Previous research on thiamethoxam and imidacloprid, have both to be effective in controlling thrips in cotton. With increased usage of PRE herbicides in Mississippi cotton production, it has been suggested that PRE herbicides may be contributing to the increase in thrips populations over the past growing seasons.  Therefore, the goal of this research was to evaluate the use of PRE herbicides and seed treatments on thrips populations and observe how each of these coincide with cotton development and yield.

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