Growth, Development, and Survival of Certain Lepidoptera Fed Gossypol in the Diet1

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In laboratory feeding tests, effects of incorporating vari- ous concentrations of gossypol acetate into the artificial diet of larvae of the beet armyworm, Spodoptera exigua (Hübner); bollworm, Heliothis zea (Boddie); cabbage looper, Trichoplusia ni (Hübner); and salt-marsh caterpillar, Estigmene acrea (Drury). were determined. As little as a 0,1% concentration of gossypol in the diet reduced the weights of larvae significantly at 10 days of age and increased the number of days required for develop- ment from eggs to adult. The LD50 concentrations were 0.06% for the salt-marsh caterpillar, 0.35% for bollworms, O.24% for beet armyworms, and 0.18% for cabbage loopers. The data suggest that gossypol might he incorporated in cotton plants as a practical control for certain lepidopterous insect pests.

Document Type: Research Article

Publication date: October 1, 1966

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