Field Evaluation of Selected Pesticides on the Natural Development of the Entomopathogen, Nomuraea rileyi , on the Velvetbean Caterpillar in Soybean 1 , 2 , 3 , 4

Significant differences in infection rates of the entomogenous fungus, Nomuraea rileyi (Farlow) Samson among populations of Anticarsia gemmatalis (Hubner) in soybean treated with benomyl, benomyl and methyl parathion, and benomyl and carbaryl were observed. Development of N. rileyi was delayed in treated plots for at least 3 weeks. The yield of the check plot was significantly higher than that of the pesticide treated plots.