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豆角钻心虫又叫豇豆螟,主要危害豆角,随春季豆角上棚后开始出现。成虫多将卵粒产于花蕾、嫩荚或叶柄上。幼虫孵化后即蛀入花蕾或幼嫩豆荚中取食,造成脱荚落蕾或雨后花蕾腐烂。蛀食入嫩荚中的幼虫随豆荚增大而长大,3龄后开始蛀入取食豆粒,危害严重时虫蛀豆荚率达到70%,雨天造成豆荚腐烂,严重影响产品质量,降低菜农收益。
Beetle boreal worm, also known as cowpea borer, the main harm to beans, with spring beans began to appear on the shed. Adults will be more eggs produced in buds, tender pods or petiole. The larvae hatch into the flower buds or young bean pods after hatching, resulting in the loss of pod drop bud or flower bud decay after rain. The larvae in the newly hatched pods increased with the increase of the pods. After the 3rd instar larvae started to eat the pea kernels, the pest pod rate reached 70% in the case of serious damage and the pod decayed in rainy days, which seriously affected the product quality and reduced the income of vegetable growers .