Increased incidence of Pythium stem rot in cowpea treated with benomyl and related fungicides
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Williams, R. J. & Ayanaba, A. (1975). Increased incidence of Pythium stem rot incowpeas treated with benomyl and related fungicides. Phytopathology, (65), 217-218.
Permanent link to cite or share this item: https://hdl.handle.net/10568/80929
In six replicated field trials during a 3-year period the incidence of cowpea wet stem rot caused by Pythium aphanidermatum was significantly greater in plots treated with benzimidazole (BZ) fungicides than in plots treated with non-BZ fungicides and nontreated plots. In laboratory studies, the growth of P. aphanidermatum in corn-meal agar was unaffected by the addition of up to 250 µg/ml active ingredient of the BZ fungicides. It seems likely that the broad-spectrum, yet selective, BZ fungicides favor the activity of P. aphanidermatum by suppressing antagonists and competitors.
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