Control of Corn Earworm Attacking Sweet Corn in California1

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Abstract
Eight chlorinated hydrocarbon insecticides were applied to the ears of sweet corn by 3 different methods and compared as to their effectiveness in controlling the corn earworm, Heliothis armigera. Individual ear applns. of sprays and dusts were most effective though fixed nozzle spray applns. show considerable promise under conditions of moderate infestations. TDE, endrin, isodrin, Q-137 and CS-708 all resulted in promising earworm control though DDT is still the preferred insecticide. Residue analyses were made on certain of the DDT treatments. Large DDT residues on the leaves, stalks and ears resulted from all treatments. The least amt. of residue was found on plants and ears treated with the individual ear sprays.

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