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茶园由于长期使用单一的农药品种以及滥用农药、施药次数过频、农药用量过大等。极易促使害虫产生抗药性。贵州安顺、黔南、黔西南等地茶区,小绿叶蝉、茶绿盲蝽、茶尺蠖等主要害虫对乐果、DDVP、辛硫磷等常用品种抗性很强,施药浓度由原来的1500~2000倍液,提高到500~800倍液;春季茶期喷药次数最高可达6次,防效由过
Due to long-term use of a single pesticide varieties of pesticides and abuse of pesticides, pesticide application frequency, pesticide use is too large. Very easy to promote pest resistance. The major pests such as tea plantation, green leafhopper, green tea bugs and tea scrofa in Anshun, Qiannan and Qianxinan areas of Guizhou have strong resistance to commonly used species such as dimethoate, DDVP and phoxim, 1500 ~ 2000 times the liquid, increased to 500 to 800 times the liquid; spraying the highest number of tea in spring up to 6 times,