Abstract
Sprays of leptophos, methomyl, and carbaryl + a commercial formulation of Bacillus thuringiensis var. alesti Berliner (Dipel®) and baits containing CSM + methomyl and CSM + carbaryl + Dipel were as effective as a conventional spray of DDT for control of Heliothis zea (Boddie). Also, sprays of acephate and Dipel alone or with chlordimeform hydrochloride appeared promising. A bait that contained CSM + ¼ lb AI/acre of methomyl was as effective as a bait that contained CSM + 1 lb AI/acre of methomyl or a spray that contained 1 lb AI/acre of methomyl. Carharyl spray alone was significantly less effective than DDT spray in 1970 and methomyl spray in 1971. Sprays of resmethrin, chlordimeform hydrochloride, and chlordimeform, and a bait containing CSM + resmethrin failed to protect the fruit effectively. The nuclear polyhedrosis virus of H. zea (Biotrol® VHZ) was more effective as a spray than in a bait; however, neither treatment gave satisfactory control.
Published Version
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