Abstract
Six cultivars of vegetable sovbean (Glycine max [L.] Merr.) were evaluated in the laboratory for relative levels of antibiosis to corn earworm (Helicoverpa zea [Boddie]). The cultivars evaluated were Fuji, Kim, Oakland, Peking, Sanga, and Toano. One plant introduction (PI 229.358) having known resistance to corn earworm and Essex, a commercial cultivar, were used as check plants. The biological data for antibiosis in a series of tests included larval weights. The results showed that cultivars Sanga, Peking, and Oakland were comparatively more susceptible while cultivars Fuji, Kim, and Toano exhibited a moderate level of leaf feeding resistance to corn earworm. The cultivars with moderate resistance can be useful in reducing corn earworm damage and cost of chemical control in vegetable soybean insect pest management systems.
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