An evaluation of selective Helicoverpa armigera control options in sweet corn

摘要: Helicoverpa armigera is a serious insect pest of sweet corn in Australia and becoming increasingly difficult to manage with conventional chemical insecticides due resistance problems. A number alternative H. control options were evaluated compared deltamethrin no action (control). The tactics were: heliothis nuclear polyhedrosis virus plus Trichogramma nr. brassicae releases; Bacillus thuringiensis; alone. tea + plots had the lowest cob damage (6.0%), followed by B. thuringiensis (12.0%), alone (20.2%), (23.2%) (53.5%). There was evidence suggest that releases any impact on egg mortality. However, there large natural population pretiosum all plots. application reduced these wasps predators, resulting higher larval infestation significantly more damage. findings indicate pathogens can effectively when their complements high levels parasitism, they have potential for use integrated management programs corn.