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当茶树病虫害严重发生时,用某些有毒的化学农药防治,能够快速有效地控制其危害。但是,经过本人在长期实践工作中观察分析,认为:使用化学农药防治病虫害也会产生三个方面的问题:第一,农药的毒性容易污染环境和引起人畜中毒;第二,农药在防治病虫的同时,也会杀害寄生性天敌和其它有益的生物,造成某些害虫的再猖獗,如小绿叶蝉等;第三,反复使用一种农药防治病虫,会使某种病虫产生抗药性。所以应该把农药防治和农业防治、生物防治、物理防治等方法,相互协调配合使用,同时改进药剂的性能,合理安全用药。在生产实践中应注意考虑五点:(1)合理选用农药。选择高效低毒低残留的农药,掌握药剂特点和防治对象,做到对症下药;(2)合理选择施药适期。掌握在害虫暴发之前或幼
When the tea tree pests and diseases serious occurrence, with some toxic chemical pesticide control, can quickly and effectively control the harm. However, after long-term observation and analysis of my own work, I think that the use of chemical pesticides to control pests and diseases will also create three problems: first, the toxicity of pesticides will easily pollute the environment and cause human and animal poisoning; second, At the same time, will also kill parasitic natural enemies and other beneficial organisms, resulting in the re-rampancy of certain pests, such as green leafhopper; third, the repeated use of a pesticide to control pests and diseases, will make some pest resistance . Therefore, pesticide control and prevention and control of agriculture, biological control and physical prevention and treatment should be used in coordination with each other and at the same time to improve the performance of medicaments and to use drugs safely and reasonably. In production practice should pay attention to consider five points: (1) rational use of pesticides. Choose pesticides with high efficiency, low toxicity and low residue, master the characteristics of medicaments and the target of prevention and cure, so as to make the right remedy; (2) Reasonably choose the appropriate pesticide application period. Master pests before or young