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苹果生长前期的主要害虫有苹果绵蚜、瘤蚜、黄蚜和叶螨(苹果红蜘蛛、山檀红蜘蛛)。历年来,全国各地发生面积较大,危害严重。因而果农不得不采取多次喷施杀虫杀螨剂来防治,不但费工费力、花钱多,而且防治效果差,同时又污染环境。为寻求防治新技术,提高其防治效果,自1990年招远县植保站与北京农业大学联合研究果树涂抹剂生产应用技术。1991年“涂抹剂涂干防治苹果前期害虫技
The main pests in the early growth of apple apple aphid, aphids, aphids and spider mites (apple red spider, sandalwood spider mite). Over the years, the occurrence of large areas across the country has caused serious harm. Therefore, farmers have to take multiple spraying insecticide acaricide to prevent and control, not only laborious and costly, but also to control the poor, while polluting the environment. In order to seek prevention and control of new technologies and improve their control effect, Zhaoyuan County Plant Protection Station and Beijing Agricultural University jointly researched the application technology of fruit tree sizing agent in 1990. 1991 "smear application of dried apple pest control technology