Test for photosynthetic inhibition by bis(N′,N′-dimethylureido)biphenyl photoproducts of monuron |
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Authors: | FS Tanaka BL Hoffer WC Walsh RH Shimabukuro |
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Institution: | Metabolism and Radiation Research Laboratory Agricultural Research Service U.S. Department of Agriculture Fargo, North Dakota 58105 U.S.A. |
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Abstract: | Five substituted biphenyl photoproducts were identified from the photolysis of 3-(4-chlorophenyl)-1, 1-dimethylurea (monuron) under varying solution conditions. These photoproducts contained functional groups that conferred phytotoxic properties to phenylurea herbicides. Therefore, a study was conducted to determine if these biphenyl photoproducts at 1, 10 and 100 μM concentrations could exhibit phytotoxic effects using the Hill reaction as the biological assay. The results show that virtually no inhibitory effects were observed from the bis-(N′,N′-dimethylureido)biphyenyl photoproducts at any of the above concentrations. |
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