Varietal Response to Tobacco Thrips, Frankliniella fusca, Feeding in Cotton

Monday, March 14, 2016
Oak Forest Ballroom Prefunction Area (Sheraton Raleigh Hotel)
Chelsie Darnell , Biochemistry, Molecular Biology, Entomology, and Plant Pathology, 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 , Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Mississippi State, MS
Don Cook , Delta Research and Extension Center, Mississippi State University, Stoneville, MS
Jeff Gore , Delta Research and Extension Center, Mississippi State University, Stoneville, MS
Darrin Dodds , Plant and Soil Sciences, Mississippi State University, Mississippi State, MS
Shannon Morsello , Syngenta, Greensboro, NC
Host plant resistance to thrips, feeding on seedling cotton has potential to reduce reliance on chemical controls. Several species of thrips feed on seedling cotton; however, tobacco thrips, Frankliniella fusca, are the most abundant in Mississippi. Thrips feed on cotton with their rasping suck mouth parts by extracting plant juices from young crop cotyledons which can cause yield loss if left uncontrolled.

Thirty varieties of cotton are planted on 95% of acreage in the United States. In this field study eighteen of these varieties where planted in replicated one row plots. Seed without any pesticides were planted to show the innate resistance of the varieties to thrips pressure. Plant damage ratings, stand counts, and thrips counts where taken several times throughout the study.  The four varieties that had the best damage ratings overall were PHY 222, FM 2011, ST 4747, and PHY 312.

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