【摘要】 我们于1977—1979年,1984—1986年对杨树防护林的害虫和益虫的种群数量动态、杨树受害过程、杨树抗性品系进行了研究,探讨了各防治手段、使用方法及其互相配合的综合效果。同时还着重研究了综合治理对策、划分林木受害等级、确定杨圆蚧发生类型、制定各发生类型的基本策略和化学防治应遵循的原则。在绥化地区开展综合防治三年以来,材积增长与经济效益显著,树干由灰返青,就绥化市1985年经济效益可达45万元左右。更多还原

【Abstract】 We conducted research on the dynamics population quantity of the injurious insect and beneficial insect,popular tree injuried process, popular resistant strain of the popular protection forestry in 1977--1979 and 1984--1986, and inquired into the applied method of every control means、combined efficiency of work in coordination. In this paper we also highlighted strategy of intergrated control, divided tree injuried grade, determitaed the kinds of occurenee of Quadraspidiotus gigas,made basic control strategy of kinds of occurence and some principles complied with chemical control. In Suihua area IPM has been carried out for three years.volume of timber increased and economic effeciency achieved 45 million yuan (only in 1985) in Suihua city.更多还原