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杀灭菊酯防治茶树害虫的效果业已肯定,本试验仅从药害和增产两个方面探讨杀灭菊酯在茶叶生产上应用的安全性及经济效益。一、试验方法杀灭菊酯的药害测定方法采用目测法、叶长相对增长率及叶面积相对增长率测定。叶长相对增长率或叶面积相对增长率测定是在各处理区内选择叶长基本一致的幼嫩叶片30张(标记近邻叶片),在喷药处理前量得各叶的长度或叶面积(叶长×叶宽×0.7)作基数,处理后定期测量相对增长率。
The effect of fenvalerate on tea tree pests has been affirmed, this experiment only from the two aspects of phytotoxicity and increase production of fenvalerate in tea production on the application of safety and economic benefits. First, the test method Determination of phytotoxicity Determination of phytotoxicity method using visual method, the relative growth rate of leaf length and leaf area relative growth rate determination. The relative growth rate of leaf length or the relative growth rate of leaf area was determined by selecting 30 young leaves (marked adjacent leaves) with basically the same leaf length in each treatment area, and measuring the length or leaf area of each leaf before spraying Leaf length × leaf width × 0.7) as the base, the relative growth rate measured regularly after treatment.