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Screening for Phytotoxic Pesticide Interactions
Author(s) -
Nash Ralph G.,
Harris William G.
Publication year - 1973
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1973.00472425000200040021x
Subject(s) - fungicide , cucumis , pesticide , chemistry , avena , phytotoxicity , triazine , greenhouse , agronomy , trifluralin , biology , horticulture , organic chemistry
Of 165 combinations of pesticides screened on two plant species in the greenhouse, 13 combinations indicated a phytotoxic interaction on at least one plant species. Combinations of the herbicide 3‐(3,4‐dichlorophenyl)‐1,1‐dimethylurea (diuron) plus the insecticides O,O ‐diethyl S ‐[2‐(ethylthio)ethyl] phosphorodithioate (disulfoton) or 1‐naphthyl methylcarbamate (carbaryl) in soil were synergistically phytotoxic to oats ( Avena sativa L.) and cucumbers ( Cucumis sativus L.). A fungicide, p ‐(dimethylamino) benzenediazo sodium sulfonate, was antagonistic to the herbicidal activity of all s ‐triazine herbicides tested on cucumbers in greenhouse experiments, but not in the field or to other plant species. The fungicide apparently limited root uptake of the s ‐triazine herbicides by limiting root growth. No chemical reaction was observed between the fungicide and the s ‐triazine herbicides.