Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Musser, Fred R.

Committee Member

Gore, Jeffrey

Committee Member

Catchot, Angus L., Jr.

Committee Member

Cook, Donald

Committee Member

Walker, Timothy W.

Date of Degree

5-11-2013

Document Type

Graduate Thesis - Open Access

Major

Entomology

Degree Name

Master of Science (M.S.)

College

College of Agriculture and Life Sciences

Department

Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology

Abstract

Two field trials were conducted to determine the impact of water management on the efficacy of insecticide seed treatments against rice water weevil, Lissorhoptrus oryzophilus Kuschel, in rice at the Delta Research and Extension Center during 2011 and 2012. The performance of thiamethoxam, chlorantraniliprole, and clothianidin was evaluated when the permanent flood was established at different timings (6 and 8 weeks after planting) and the effect of flush number (0, 1, or 2) on seed treatment performance was evaluated. Seed treatment efficacy was not impacted by delayed flooding, but 2 flushes reduced efficacy of some seed treatments. Experiments were also conducted to determine the impact of reduced seeding rates found in hybrid rice production on the efficacy of insecticide seed treatments targeting rice water weevil. Efficacy was similar when comparing currently labeled rates of thiamethoxam, chlorantraniliprole, and clothianidin with higher rates of these products.

URI

https://hdl.handle.net/11668/20560

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