Dissertation/Thesis Abstract

Refinement and Validation of Soybean Looper, Chrysodeixis includens (Walker), Thresholds in Mississippi Soybeans Glycine max (L.) Merr.
by Huff, Mary Kathryn, M.S., Mississippi State University, 2020, 101; 27742685
Abstract (Summary)

Experiments were conducted to refine and validate the soybean looper, Chrysodeixis includens (Walker) threshold in Mississippi soybeans, Glycine max. (L.) Merr. Equivalencies between sweep net and drop cloth sampling methods were evaluated, overall the sweep net was more effective at capturing soybean looper larvae greater than third instar and larvae less than or equal to third instar when compared to the drop cloth method. Feeding studies were conducted to determine the feeding rates of each instar, results showed that fifth instar larvae consume the greatest amount of leaf tissue, and larvae greater than or equal to third instar consume more leaf tissue than larvae less than third instar. Observed and expected/predicted defoliation rates were calculated. Observed defoliation was lower than predicted defoliation possibly due to field environmental conditions. Using data in combination with published data from other studies, three prediction models were created for the R3, R5, and R6 growth stage.

Indexing (document details)
Advisor: Cook, Donald R, Catchot Jr, Angus L
Commitee: Gore, Jeffrey, Musser, Fred R, Irby, Jon T
School: Mississippi State University
Department: Entomology and Plant Pathology
School Location: United States -- Mississippi
Source: MAI 81/11(E), Masters Abstracts International
Source Type: DISSERTATION
Subjects: Entomology
Keywords: Soybean, Soybean looper, Thresholds
Publication Number: 27742685
ISBN: 9798643188148
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