Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Towles, Tyler B.

Committee Member

Cook, Don R.

Committee Member

Crow, Whitney D.

Committee Member

Catchot, Angus L.

Date of Degree

12-13-2024

Original embargo terms

Worldwide

Document Type

Graduate Thesis - Open Access

Major

Life Sciences (Entomology)

Degree Name

Master of Science (M.S.)

College

College of Agriculture and Life Sciences

Department

Department of Agricultural Science and Plant Protection

Abstract

The tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), is an important economic pest of cotton, Gossypium hirsutum (L.), in the Midsouth region of the United States. An experiment was conducted to determine the impact of insecticide class loss on yield and Lygus populations in the recently commercialized ThryvOn cotton technology. Data indicated no significant yield loss when excluding any currently utilized insecticide class for tarnished plant bug management. An additional objective was to reevaluate the sampling interval necessary to scout ThryvOn cotton for Lygus. No significant differences were observed between a 3 or 7-day sample interval compared to plots treated weekly. A third experiment was performed to determine the efficacy of various at-planting insecticides across the Midsouthern United States for the control of thrips (Thysanoptera: Thripidae) in seedling cotton. No definitive changes in percent control of immature thrips were observed from 2014-2023.

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