Title

Impact of Water Management Strategies on Populations of Rice Water Weevil, (Coleoptera: Curculionidae)

Issuing Body

Mississippi State University

Advisor

Catchot, Angus

Committee Member

Gore, Jeff

Committee Member

Golden, Bobby

Committee Member

Cook, Don

Committee Member

Krutz, Jason

Date of Degree

1-1-2019

Original embargo terms

Visible to MSU only for 1 Year

Document Type

Graduate Thesis - Open Access

College

College of Agriculture and Life Sciences

Department

Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology

Abstract

Experiments were conducted to determine the impact of water management strategies on populations of rice water weevil, Lissorhoptrus oryzophilus Kuschel. One experiment was conducted at the Delta Research and Extension Center during 2017 and 2018. The performance of chlorantraniliprole and thiamethoxam was evaluated in combination with flood removal of a field as a cultural control tactic for rice water weevil. Seed treatments significantly reduced rice water weevil populations at the prelood sample timing, only chlorantraniliprole reduced populations at the post-drainage sample timing. Overall, flood removal had little impact on rice water weevil management. An experiment was also conducted to determine the spatial and temporal distribution of rice water weevil larvae within a furrow irrigated rice production system. This experiment was established across eleven grower fields in major rice producing counties across the Mississippi Delta from 2017 to 2018. Fields were divided into three zones based on free standing water within that portion of the field between irrigation events. Rice water weevil larval populations were reduced in portions of the field that did not remain at two of the three sample timings. An experiment was conducted at the Delta Research and Extension Center during 2017 to determine the impact of various water management strategies and insecticide seed treatments on rice water weevil populations. The –10 cm free standing water management strategy significantly reduced rice water weevil populations from the untreated control. Chlorantraniliprole had significantly higher yields across all water management strategies compared to other seed treatments and the untreated control.

URI

https://hdl.handle.net/11668/21219

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