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大豆品种对食心虫的抗虫性表現在两个方面:(1)成虫迴避产卵。(2)幼虫入莢死亡率高。試驗証明:大豆食心虫成虫在有毛的大豆品种上,绝大多数产卵于豆莢上;在无毛的大豆品种上,绝大多数产于托叶內,从这一部位孵化的幼虫,于爬行入莢的过程中,有相当一部分幼虫死亡,因而其入莢率及虫食率较有毛品种低。在有毛品种中,铁莢四粒黄有較好的抗虫性,比一般品种的虫食率要低5％左右,其抗虫作用主要是幼虫入莢死亡率高,初入莢的1、2龄幼虫绝大多数死于莢皮及种粒間的組織中。目前,已培育出铁莢四粒黄的杂交后代——吉林一号表現有抗虫丰产性能,已在生产上推广。
Insect resistance of soybean cultivars to bollworms is manifested in two aspects: (1) adults avoid spawning. (2) larvae into the pod high mortality. Tests show that: adult soybean soybean worms in hairy soybean varieties, the vast majority of spawning on the pods; in hairless soybean varieties, mostly produced in the stipules, larvae hatch from this part of the crawling Into the pod in the process, a considerable part of the larvae died, so its pod rate and worm rate lower than the hairy varieties. In the hairy varieties, iron pods four yellow better pest resistance than the average species insecticidal rate lower about 5%, the main insect resistance larvae pod into the high mortality rate, pod 1 , Most of the second instar larvae die in the pod skin and interspecific tissues. At present, the hybrid progeny of four yellow iron pods has been bred - Jilin No.1 showed insect resistance and high yield performance, and has been popularized in production.