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近年来,玉渊潭大温室白粉虱发展很快,已经成为一种主要害虫,影响蔬菜的正常生长和产量。为了更好地控制温室白粉虱的发展,我所和玉渊潭农业管理站的技术人员联合起来,与玉渊潭大温室商订防治温室白粉虱的技术合同,从掌握虫情入手,及时防治。从一九八一年十月开始到一九八二年六月止,执行合同之后大温室的白粉虱大大减少,据5月中旬调查,两道温室(60亩)的虫口率都控制在每叶4.1—10.1头,而且煤污病较少。由于加强
In recent years, Yuyuantan large greenhouse whitefly developed rapidly, has become a major pest, affecting the normal growth and yield of vegetables. In order to better control the development of greenhouse whitefly, I and Yuyuantan agricultural management station technicians together, and Yuyuantan large greenhouses to negotiate the greenhouse whitefly technology contract, starting from the grasp of insects, and timely control. From October 1981 until June 1982, the number of whitefly in the greenhouse was greatly reduced after the implementation of the contract. According to the survey conducted in mid-May, the population rates of both of the two greenhouses (60 mu) were controlled at Leaves 4.1-10.1 head, and less coal pollution. As strengthened