Green cloverworm (Lepidoptera: Noctuidae) as an alternate host for natural enemies of lepidopteran pests of soybean in South Carolina

摘要

abstract_textpParasitoids, pathogens, and predators of lepidopterans were monitored during 1985 and 1986 in 14 fields of soybean, Glycine max (L.) Merrill, near Blackville, South Carolina. Chemical (permethrin at 0.0225 kg AI/ha) control of early-season green cloverworm, Plathypena scabra (F.), in soybean fields did not have an impact on predator population density later in the season when compared with untreated control fields. Chemical control of green cloverworm did not affect incidence of the entomopathogenic fungus Nomuraea rileyi (Farlow) Samson in subsequently occurring lepidopteran populations during 1985 when green cloverworm and soybean looper, Pseudoplusia includens (Walker), populations overlapped. However, its incidence was enhanced in soybean looper populations in untreated fields during September 1986 when green cloverworm did not occur in an overlapping generation with soybean looper. Cotesia marginiventris (Cresson) was the most prevalent parasitoid, and its parasitism of soybean looper was not dependent upon its prior occurrence in green cloverworm populations./p/abstract_text