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豆荚螟又称豆蛀虫、红虫等。在国内分布普遍。主要为害豆科植物,对大豆、豇豆、菜豆、扁豆等的果荚和种子为害严重。一、形态:成虫全体灰褐色,体长10～12毫米,翅展22～24毫米,前翅狭长,紫灰色,沿前缘有一条白色纵带,翅基三分之一处有金色隆起横带,外侧镶有淡黄色宽带。后翅灰白色,卵椭圆形,表面密布网状刻纹,初产时乳白色,后变红色。幼虫体长14～18毫米,背面紫红色,腹面绿色。前胸背板上有1个“人”字形黑斑,两侧也各有1个黑斑,后缘中央有小黑斑2个。老熟幼虫背线、亚背线、气门线、气门下线均明显。气门黑色,蛹黄褐色,体长9～10毫米,触角及触芽伸至第五腹节后缘,腹端钝圆,有臀刺6根。二、生活史和习性:豆荚螟属鳞翅目螟蛾科。在江苏、安徽一年发生4～5代,以老熟幼虫在大豆本田及晒场周围土中越冬。成虫昼伏夜出,趋光性弱,飞翔力不强。成虫羽化的当天半晚开始交配,次日开始产卵。每头雌蛾可产卵80～90粒。结荚前多产于幼嫩的叶柄、花柄、嫩芽及嫩叶背面;结荚后,产在豆荚表面的细毛间。一般每荚1粒,也有少数2粒以上的。初孵幼虫在
Pod moth also known as bean borer, red worms and so on. Distribution in the country is common. Mainly harmful to legumes, on soybean, cowpea, beans, lentils and other pods and seeds of serious damage. First, the form: the adult beige, body length 10 ~ 12 mm, wingspan 22 ~ 24 mm, long wings narrow, purple, along the front edge of a white longitudinal band, the wing third base of a golden uplift band , The outside is set with light yellow broadband. Hind wings gray, oval oval, dense mesh surface pattern, primiparous white, red later. Larvae body length 14 ~ 18 mm, back purple, ventral green. There is a front of the chest back “person ” glyph dark spots, each side also has a black spot, trailing edge central there are two small black spots. Mature larvae back line, sub-back line, valve line, valve off the assembly line were significantly. Valve black, pupa brown, body length 9 ~ 10 mm, tentacles and touch bud stretch to the fifth abdominal section of the posterior margin, blunt abdominal end, gluteus 6. Second, the life history and habits: pod borer is a Lepidoptera Pyralidae family. In Jiangsu, Anhui occurs 4 to 5 generations a year, with mature larvae over the winter in the soy Honda and the surrounding soil in the drying field. Adults nocturnal, weak phototaxis, flying force is not strong. Adult insects began to mate half past midnight on the same day and spawn the next day. Each female moth spawns 80 to 90. Pre-pod prolific in young petiole, peduncle, shoots and young leaves on the back; after podding, produced in the pod surface of fine hair. Generally 1 per pod, but also a few more than 2. Freshly hatched larvae at