Abstract
Chemosterilant feeders, attached to insect traps equipped with blacklight lamps, were installed in an 8-acre field cage containing sampling sites planted to corn and tobacco. Laboratory-reared Heliothis zea (Boddie) and H. virescens (F.) were released into the cage. Moths were attracted to the blacklight trap and were chemosterilized when they exited the feeder. Eggs collected from corn and tobacco were checked for hatch and for parasitization by Trichogramma spp. The combination of light trap plus chemosterilant feeder plus parasitism by Trichogramma showed Heliothis egg hatch from corn of 11% and 25% from tobacco. Females collected from the 8-acre cage and egged in the laboratory had egg hatch of 4% for H. zea and 36% for H. virescens as compared with hatch from control females of 49% and 54%, respectively.
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