The effect of pesticides on development of Beauveria bassiana (Balsamo) was examined both in liquid culture and in the field. The commonly recommended lateblight fungicides and insecticides inhibited growth of B. bassiana. The experimental fungicide CGA48988 and the insecticide permethrin showed the least inhibition of the fungus. Field experiments with the Colorado potato beetle, Leptinotarsa decemlineata (Say), supported laboratory findings.
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Clark et al. (1982) studied this question.