梨铁象 Styanax apicatus Heller 属象虫科,是梨树的毁灭性害虫,严重为害15—20年生的优生梨树林。在我县一年半完成一代,以成虫在树枝上和各龄幼虫在树皮下的蛀道内越冬,也发现以蛹越冬.翌年3月中旬越冬幼虫开始活动,越冬蛹也相继羽化。幼虫在主干及大侧枝表皮下的木质部蛀食为害,幼虫期在8个月以上,老熟后即在蛀道内化蛹。5月中旬蛀入表皮下和木质部做蛹室化蛹,蛹期20天左右。6月上旬羽化成虫,最盛期为6月 Pear iron icon Styanax apicatus Heller belongs to the family of insects, is a devastating pest of pear tree, which seriously damages the eucalyptus pear tree which is 15-20 years old. In our county a year and a half to complete the generation of adult worms on the branches and larvae of the larvae in the bark tunnel winter, also found that the pupae overwintering .In mid-March the winter overwintering larvae began to move, overwintering pupae have also emerged. The larvae in the trunk and large lateral branch of the epidermis of the xylem eating damage, larval period of 8 months or more, after aging in the tunnel that pupation. In mid-May eaten into the epidermis and xylem pupation chamber pupation, pupal period of about 20 days. Early June adult emergence, the peak for June