【摘要】 杨圆蚧(Quadraspidiotus gigas)是危害物树人工林主要害虫之一。为尽快建立起杨圆蚧害虫科学管理体系,以化学防治为应急措施,较系统地研究了杨圆蚧地防治时间、药剂种类、施药方法,协调化学防治与生物防治的关系等项内容。1984—1986年试验,杨圆蚧化学防治的最佳时期是雌成虫羽化盛期和初孵若虫的孵化盛期,在绥化地区的时间分别为5月15日左右和6月25日左右,同时还避免对杨圆蚧主要的天敌——蚜小蜂地杀伤。在成虫防治期,杀虫效果最佳的为杀虫优(一、二号)、D-T-4、C-T-3、A-T-1、B-T-2、防蚧油触杀型药剂,校正死亡率都在84％以上。在初孵等若虫防治期,杀虫效果最佳的为杀虫优(一、二号)B-T-2、A-T-1、C-T-3,D-T-4、杀蚧油、DDVP柴油等触杀型药剂,效果都在94％以上。在施药方法上先把杨圆蚧壳刷掉后,再行涂干或喷干效果最佳。更多还原

【Abstract】 The Scale-insect, Quadraspidiotus gigas is one of the important pests in poplar plantation. With the aim to establish the scientific management system of Q. gigas rapidly, we conducted the studies on the time and raethods of applying chemical and biological control based on taking the chemical control as an argent measure. Result of the field tests conducted in 1984—1986 showed that the high time for chemical control vas in the abundant emergence period of female adults and hatching period of newly hatched larvae. It was about on May 15th, and June 25th in suihua respectively. Preventing its an important natural enemy parasitic aphidcholcid from being killed, the most effective chemicals abfaired from the tests was D-T-4, C-T-3, A-T-1, B-T-2, and other contact insecticides in controlling adults. The corrected mortality was over 84%. In control period of newly hatched Larvae, B-T-2, A-T-1, C-T-3, D-T-4 and other some contact insecticides was the most effective. The mortality was over 94%. The method of using brush to brush off scale-shells, then spraying or trunks has been proved to be more effective.更多还原