二、梨小食心虫梨小食心虫成虫体长6—7毫米,全体灰褐色或灰黑色。前翘与体同色,前缘有8—10组白色短斜纹,翅中央有一个白色小点是此虫的主要特征。卵扁椭圆形,直径不到1毫米,周缘扁平,中央微隆起,白色,半透明,孵化前透过卵壳可见小幼虫的黑色头壳。老熟幼虫粉红色或黄白色,10—14毫米。蛹褐色,第3—7腹节背面有两排小刺,腹末有八根钩刺。(图均见封二) Second, small pear heart pest insects Pear worm body length of 6-7 mm, the whole gray brown or gray-black. Before Alice and body the same color, the front has 8-10 sets of white short twill, wing central has a white dot is the main feature of this pest. Eggs flattened oval, less than 1 mm in diameter, margin flattened, central slightly raised, white, translucent, showing black larvae of small larvae through egg shell before hatch. Mature larvae pink or yellowish white, 10-14 mm. Pupa brown, the back of the 3-7 abdominal segment with two rows of small thorns, abdomen with eight barbs. (Figure are sealed two)