Resistance of Certain Soybean Cultivars to Bean Leaf Beetle, Striped Blister Beetle, and Bollworm1234

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Abstract
Twenty-one experimental soybean, Glycine max (L.), cultivars and 3 commercial cultivars were planted in small plots in large field cages and subjected to infestation by the bean leaf beetle, Cerotoma trifurcata (Forster). Resistance was determined by measurement of leaf consumption. Of the 24 cultivars tested, PI 165989, PI 171451, PI 227687, PI 229321, and PI 229358 rated the highest degree of resistance to bean leaf beetle. Tests for resistance to the striped blister beetle, Epicauta vittata (F.), were conducted in 3-foot cubical cages in 1969 and 1970. Twenty-four soybean cultivars in 1969 and 7 in 1970 were subjected to striped blister beetle infestation when the plants were in the seedling stage. PI 227687 exhibited a high level of resistance to the striped blister beetle and sustained only a small amount of feeding damage. Cultivars FC 31921, PI 171451, PI 227687, PI 229358, and commercial varieties ‘Lee’ and ‘Hardee’ were subjected to a continuous infestation of moths of the bollworm, Heliothis zea (Boddie), most of the growing season of 1970. Oviposition was lowest on PI 171451 and highest on PI. 227687, but the least amount of pod damage was sustained on this cultivar, suggesting antibiosis to larvae.

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