Field Assessment of the Effects of a Microbial Pest Control Agent on Nontarget Lepidoptera

摘要: Species in a guild of nontarget leaf-feeding Lepidoptera on Garry oak, Quercus garryana Dougl., were monitored the field for period 3 yr (1986–1988) to assess ecological effects three applications microbial pest control agent, Bacillus thuringiensis Berliner var. kursraki within single-season application (spring 1986). The target species B. was gypsy moth, Lymanrria dispar (L.), large-scale eradication program Lane County, Oreg. richness oak significantly reduced treated plots during all study. Also, total number individual first 2 but not third. These data suggest that certain may be ecologically “at risk” programs based kurstaki . Variables such as phenology, voltinism, and plot size are discussed regarding degrees risk type most affected by largescale agent programs.