Pest status of three cornered alfalfa hoppers in Mississippi soybean

Monday, November 11, 2013: 8:36 AM
Meeting Room 15 (Austin Convention Center)
Jeff Ramsey , Mississippi State University, Mississippi State, MS
Angus Catchot , Dept. of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS
Fred Musser , 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, MS
Don Cook , Delta Research and Extension Center (DREC), Mississippi State University, Stoneville, MS
Abstract: Threecornered alfalfa hopper is a common pest of soybeans.  Previous research has shown that the former treatment threshold of 1 TCAH/sweep is too low, but it is still unknown what the higher threshold should be.  Currently the threshold is 2 TCAH/sweep.  Threecornered alfalfa hoppers can be found on soybean from seedling emergence until physiological maturity.  Early season feeding on vegetative soybeans can be economic, but  many fields are planted with treated seed which provides some protection from early season feeding.  Most foliar applications targeting TCAH occur during later reproductive stages.  From 2007 to 2011, an average of 22% of soybean acreage in MS was sprayed for TCAH.  However, in research trials, we have not been able to document any yield loss from TCAH feeding during reproductive stages.  It is expected that the number of insecticide applications targeting TCAH will decrease as a result of this research and the insecticides applied will be used more effectively.
See more of: 18- Graduate Student Ten-Minute Paper Competition: P-IE
See more of: Student TMP Competition
<< Previous Presentation | Next Presentation >>

ESA Annual Meetings