Page Banner

United States Department of Agriculture

Agricultural Research Service

Title: The Effect of Adjuvant Class on Absorption of Selected Cotton Harvest Aids and Resulting Necrosis

Authors
item Stair, D - TEXAS A&M UNIVERSITY
item Cothern, J - TEXAS A&M UNIVERSITY
item Tarpley, Lee

Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Proceedings
Publication Acceptance Date: February 5, 1998
Publication Date: N/A

Interpretive Summary: This project studied the effects of adjuvants upon uptake of radiolabeled compound applied to individual leaves. Ammonium sulfate increased uptake of fluthiacet-methyl and endothall during evening treatments, but decreased paraquat salt formation. It was found that Pelargonic acid had less influence on uptake, and relatively more influence on efficacy of paraquat and endothal. Pelagonic acid and Eth-N-Gard most consistenly maximized uptake of fluthiacet- methyl during morning and evening.If consistency of efficacy can be enhanced, then the temptation to apply these herbicidal compounds in excess will be lessened, and environmental quality preserved.

Technical Abstract: Cotton (Gossyium hirsutum L.) desiccants and defoliants are not consistenly efficacious. We are systematically determining causes for inconsistency of several compounds. Low absorption (or uptake) of compound into the leaf could limit efficacy. The effects of adjuvants upon uptake of radiolabeled compound applied to individual leaves was examined. Ammonium sulfate increased uptake of fluthiacet-methyl and endothall during evening treatments, but decreased paraquat uptake during some conditions possibly due to paraquat salt formation. Pelargtonic acid had less influence on uptake, and relatively more influence on efficacy of paraquat and endothall. Pelargonic acid and Eth-N-Gard most consistenly maximized uptake of fluthiacet-methyl during morning and evening. If consistency of efficacy can be enhanced, then the tempation to apply these herbicidal compounds in excess will be lessened, and environmental quality preserved.

Last Modified: 11/1/2014
Footer Content Back to Top of Page