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Effect of different formulations on the biological activity of herbicide cyhalofop-butyl


Effect of different formulations on the biological activity of herbicide cyhalofop-butyl



Agricultural Chemistry and Biotechnology 38(5): 440-446



In order to select the proper formulation of newly developed herbicide Cyhalofop-butyl(n-butyl-(R)-2-(4(2-fluro-4-cyanophenoxy)phenoxy)propionte) to Echino-chloacrus-galli(L)P. Beaw. several formulations were made and tested by biological assay. Weed control of wettable powder formulated with two adjuvants on E. crus-galli showed higher effect as compared with the formulation made without adjuvants. Higher concentration of adjuvants resulted in higher absorption and higher weed control on E. crus-galli. However, adhesional force of wettable powder applied to leaf surface was not positively correlated to the amount of herbicide absorption. The weeding effect and amount of herbicide absorbed on E. crus-galli were higher by emulsifiable concentrate formulations with different HLB and non ionic surfactants as compared with wettable powder formulations. The higher adhesional force and higher absorption of herbicide on E. crus-galli were obtained from microemulsion than the others. Granulization of the herbicide with appropriate adjuvants in a form of resurfacing on the submerged water gave rise to a good weeding effect and believed to be a possible promising formulation.

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