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一、大豆主要虫害1.蛴螬。蛴螬俗称蛭虫,是金龟子的幼虫,属鞘翅目金龟甲科。蛴螬栖息在土壤中,咬食作物幼根及茎的地下部分,造成植株断根、断茎,枯萎死亡,农田缺苗、断垄严重。1.1形态特征。成虫体长16~21毫米,椭圆形,黑褐色,有光泽。卵椭圆形,白色。幼虫体长3厘米,头部黄褐色,胴部乳白色,身体弯曲,多皱褶。蛹淡黄色。1.2生活习性。成虫2~3年发生1代。以2~3龄的幼虫和成虫在土中越冬。
First, the main pests of soybean 1 蛴 螬. Commonly known as vermiculata 蛴,, is a beetle larvae, Coleoptera is a Branch Carapace. Habitat perched in the soil, bite the roots of crops and roots of stems, resulting in plant roots, broken stems, withered death, lack of seedlings, severely broken ridge. 1.1 morphological characteristics. Adult body length 16 ~ 21 mm, oval, dark brown, shiny. Egg oval, white. Larvae body length 3 cm, head brown, milky white body, body bent, more folds. Pupa light yellow. 1.2 Habits. Adults 2 to 3 years occurred 1 generation. 2 to 3 instar larvae and adults overwintering in the soil.