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长期以来,茶园频繁使用化学农药,使害虫产生了较强的抗药性,加上茶园害虫天敌被大量杀伤,导致茶园害虫暴发,防治次数增多,用药量增加。为此,从源头上控制农药残留,减少化学农药使用,保护天敌,是无公害茶、绿色食品茶和有机茶园建设的关键。为了推广茶叶安全生产,寻找可替代化学农药,且对茶树安全、对害虫有防效的植物农药,2005 年,杭州市余杭区余杭镇农技服务中心以该镇新岭反山50 亩茶园为试验示范基地,进行了1％苦参碱·印楝素对茶园主要害虫的防效试验,现将试验结果初报如下。
For a long time, the frequent use of chemical pesticides in the tea plantations made the pests produce stronger resistance. In addition, a large number of natural enemies of tea plant pests were killed, leading to outbreaks of tea plantation pests, increasing the number of prevention and treatment and increasing dosage. To this end, from the source control of pesticide residues, reduce the use of chemical pesticides to protect natural enemies, is the key to building pollution-free tea, green tea and organic tea plantation. In order to promote the safe production of tea, look for alternative chemical pesticides, and the safety of tea, pest control plant pesticides, in 2005, Yuhang District, Hangzhou Yuhang Agricultural Technology Service Center to the town of Xinling anti-Hill 50 acres of tea garden Experimental demonstration base, conducted a 1% matrine azadirachtin main pests on the tea control effect test, the test results are as follows.