Screening for resistant sources of soybeans to leaf-feeding insects

摘要

Three soybean genotypes, P.I. 171451, P.I. 227687 and P.I. 229358, have been screened out for their resistance to Mexican bean beetle [Epilachna varivestis Mulsant] (Van Duyn et al, 1971). Subsequent studies on the three P.I. s proved them to be resistant to diverse leaf-feeding insects including corn ear worm [Heliothis zea (Boddie)], tobaco bud worm [Heliothis virescens (F.)]. cabbage looper [Trichoplusia ni Hubner], striped blister beetle [Epicauta vittata (F.)]. soybean looper [Pseudoolusia [ncludens (Walker)], and velvet bean caterpillar [Anticarsia gemmatalis Hubner] (Clark et al., 1972, Luedderand Dickerson, 1977, Hatchett et al., 1976, Kilen et al., 1977, and Beach 1988). Commercial soybean cultivars and advanced breeding lines were evaluated for their resistance to some insect species (Lambert and Kilen 1984; Joshi and Nobakht 1988). Several breeding lines with resistance to leaf-feeding insects were registered (Kilen and Lambert 1993). By incorporating resistance from P.I. 229358 and P.I. 171451 to commercial cultivars, Lamar and Crockett with multiple resistance to leaf-feeding insects were developed and released (Hartwig, Lambert and Kilen 1990, Bowers 1990).