Influence of Bentazon on the Phytotoxicity of Paraquat to Peanuts (Arachis hypogaea) and Associated Weeds

Author:

Wehtje Glenn,Wilcut John W.,McGuire John A.

Abstract

Bentazon reduced paraquat phytotoxicity to Texas panicum, sicklepod, Florida beggarweed, and peanut. Bentazon applied alone had minimal effect on these species. Smallflower morningglory was more sensitive to bentazon than to paraquat; the interaction of paraquat and bentazon varied from antagonistic to synergistic depending upon the specific combination of rates. Antagonism with tank-mixed combinations was also obtained by applying bentazon prior to paraquat, but not with the reverse. Studies with14C-labeled herbicides revealed that each herbicide inhibited foliar penetration of the other. In field studies, adding bentazon to paraquat reduced crop injury. However, except for smallflower morningglory, weed control was also reduced.

Publisher

Cambridge University Press (CUP)

Subject

Plant Science,Agronomy and Crop Science

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