Dissertation/Thesis Abstract

Development of a high throughput surfactant screening procedure using shikimic acid analysis
by Massey, Cody Alan, M.S., Mississippi State University, 2012, 57; 1530705
Abstract (Summary)

In field efficacy trials most glyphosate/surfactant combinations tested control barnyardgrass as well as pre-formulated glyphosate products 21 days after treatment (DAT). Pre-formulated glyphosate products controlled barnyardgrass quicker than combination treatments, most likely due to improved glyphosate formulations with improved surfactant systems. In greenhouse trials, pre-formulated glyphosate products exhibited greater fresh weight reductions across all species tested, including barnyardgrass, broadleaf signalgrass, hemp sesbania, johnsongrass, large crabgrass, pitted morningglory, prickly sida, sicklepod, yellow foxtail and Palmer amaranth. Nonionic tallow amine treatments exhibited variable control among species.

A shikimate analysis was developed using non-glyphosate-tolerant soybean to estimate efficacy of surfactants; data were then correlated to the visual efficacy data on barnyardgrass in the field. However, there was not sufficient variability in barnyardgrass control to use the shikimate analysis as a predictor.

Indexing (document details)
Advisor: Shaw, David R.
Commitee: Byrd, John D., Koger, Clifford H., Massey, Joseph H.
School: Mississippi State University
Department: Plant and Soil Sciences
School Location: United States -- Mississippi
Source: MAI 51/04M(E), Masters Abstracts International
Subjects: Plant sciences
Keywords: Barnyardgrass, Glyphosate, Shikimic acid, Surfactants
Publication Number: 1530705
ISBN: 978-1-267-80258-3
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