A natural adjuvant shows the ability to improve the effectiveness of glyphosate application
2019
Hao, Y. (East China University of Science and Technology, Shanghai (China). School of Pharmacy, Shanghai Key Laboratory of Chemical Biology) | Zhang, N. | Xu, W. | Gao, J. | Zhang, Y. | Tao, L.
Glyphosate is a common herbicide used worldwide, but its adjuvant has not been studied much. A new adjuvant A-178(R), based on the coconut shell extracts, has been developed for glyphosate (glyphosate isopropylamine salt: GP). The potency of the new adjuvant was compared with traditional adjuvant polyethoxylated tallow amine (POEA). Field study has shown that A-178(R) can improve the herbicidal effect of GP formulation, and, as compared with 41% GP mixed with 7% POEA (GPP), 41% GP mixed with 7% A-178(R) (recommended dose, GPA) is more effective for weed control. GPA improved herbicidal activity against GP alone by 79.27% and against GPP by 27.38% at 500 g a.i./ha. A-178(R) decreased the surface tension, increased the spreading area of GP, and improved the uptake of GP in cockspur (Echinochloa crus-galli L.). Our results indicated that the new adjuvant shows better ability to improve glyphosate efficacy than does POEA.
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