Environmental Entomology · 1974 · 49 citations · 0 references
Life SciencesBiologyEntomologyAgricultural EntomologyParasite EcologyParasitologyArthropod ParasitologyField Crop EntomologyParasite SpreadParasitoid BiologyParasitoid EcologyPest ControlEgg ParasitismUltra-low-volume Application
Individual releases of 19,000–387,500 Trichogramma adults per acre on up to 48 acres of cotton at College Station, Tex., resulted in parasitism of Heliothis eggs averaging from 33–81%, with some movement of parasites up to 400 ft within 2 days. Subsequent generations of Trichogramma were not produced in the field due to mortality, apparently caused by drift of methyl parathion (ultra-low volume) which killed 75% of the adult Trichogramma at distances of up to one mile downwind from sprayed fields.