【摘要】 宽肩象(Ectatorrhinus adamsi pascoe)是青麸杨(Rhus potaniniMaxim)的蛀干性害虫。在汉中地区一年发生一代,以成虫越冬,4月初开始活动5月中旬产卵于树皮内,卵期10天。幼虫取食形成层,然后进入木质部。8月中旬化蛹,9月羽化为成虫。成虫不善活动,假死性很强,每雌产卵量平均为7.8粒。此虫的发生与品种、树龄、树势、树干部位,以及林木的立地条件均有一定关系。林间试验结果表明:50％杀螟松,300倍液和每毫升2亿孢子的白僵菌液防治效果较好。更多还原

【Abstract】 Broad-shouldered weevil, Ectatorrhinus adamsi Pascoe is an important pest of Rhus potanini Maxim. in Shaanxi province.The weevil takes one year to complete its life cycle in Hanzhong area. It overwinters as adult and stars action in next early April. In the middle part of May tne female adult oviposites beneath the bark, in which the egg period is about 10 bays. Its larva attackes cambium and then bored into xylem. Pupa appears in the middle part of August and usually the new adult emerges in September.The weevil acts slowly and has good playing possum ability. The mean amount of laying-egg of female is 7.8. It is certainly related to bored, age, health, growing condition and different part of trees for this weevil to occure.Test in forest shows that Folithion (50%) in concentration 1: 300 and suspended liquid with 0.2 billion spores per millitre of Beauvera bassiana are effective to kill the larva.更多还原