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梨星毛虫(Illiberis Pruni Dyar.)是武威地区重要果树害虫,主要为害苹果和梨。据调查,全区发生面积达二万三千多亩,约占全区成龄果园面积的80％。七十年代后期,该虫的为害逐年回升,特别是对苹果树的为害逐年加重,平均减产10—40％,许多果园因梨星毛虫为害而绝产。为寻找经济有效的防治措施,控制梨星毛虫的发生为害,我们从1985—1988年进行了室内外系统饲养观察,对其生物学特性及其防治方法做了研究。现将结果报导如下: 一、材料和方法 (一)室内饲养: 冬春季采集田间越冬幼虫茧保存于保湿的饲养缸中,待出蛰后供给幼嫩花芽、嫩
Illiberis Pruni Dyar. Is an important pest of fruit trees in Wuwei area, mainly affecting apples and pears. According to the survey, an area of 23,000 mu occurred in the whole region, accounting for about 80% of the area’s mature orchard area. In the late seventies, pest damage rose year by year, especially the damage to the apple tree year by year, an average reduction of 10-40%, many orchards due to pear star caterpillar infestation. In order to find cost-effective prevention and control measures and to control the occurrence of pear-shaped caterpillar, we studied the indoor and outdoor systematic feeding from 1985 to 1988, and studied its biological characteristics and methods of prevention and treatment. Now the results reported as follows: First, materials and methods (a) indoor feeding: winter and spring collection of overwintering larvae in the field cocoon preservation in the feeding tank, to be out after the supply of young flower buds, tender