茶树病虫综合治理茶树病虫的化学防治虽然对茶叶高产优质发挥了一定作用,但也产生了不少问题。如当年对某种病虫采用较高浓度药物防治,虽然病虫基本被消灭,但第二年还会发生,甚至更严重;农药用量逐年增加,防治效果反而下降等等。这是由于长期单一施用化学农药破坏了茶园生态平衡,大量的天敌被杀伤和害虫产生抗药性所致。近几年来 Comprehensive control of tea tree pests Chemical control of tea tree pests Although the high yield of tea play a role, but also had a lot of problems. If the year of a higher concentration of pests and diseases using a drug control, although pest and disease basically eliminated, but the second year will occur even more serious; the amount of pesticides increased year by year, but the control effect of decline and so on. This is due to the long-term single application of chemical pesticides to destroy the tea plantation ecological balance, a large number of natural enemies were killed and pests caused by resistance. In recent years