SURVIVORSHIP OF HELIOTHINES ON SELECTED REPRODUCTIVE STRUCTURES OF VIPCOT COTTON LINES

摘要

A laboratory study quantified heliothine survivorship on selected reproductive structures of a VipCot cotton line. Heliothine larvae were allowed to feed on selected reproductive structures of a non-Bt variety or a VipCot line for 96 h. Heliothine mortality was nearly 100% on VipCot plant terminals and flower petals. Tobacco budworm, Heliothis virescens (F.), larval mortality was significantly lower on whole squares, square bracts, and bolls of VipCot compared to that for bollworm, Helicoverpa zea (Boddie) larvae.