率杀

pH值和缓冲液对提取物的提取率及其杀线活性影响不大。

Buffer liquid and pH had little effect on the nematocidal activity of extract .

在决定种群是否灭绝上，不育率、灭杀率、选择性收获率等的作用是相同的。

On determining whether rodent pest population becomes extinct , the contraception rate , kill rate , harvest rate etc have same effect .

水与甲醇两种不同提取溶剂的提取率及提取物的杀线虫活性间均存在显著性差异。

The differences among the extractive rate and nematicidal activities of the extracts with water and methanol were significant .

结果如下：1.冷浸法与闪式提取法两种提取方法的提取率及提取物的杀线虫活性间均不存在显著性差异。

The results could be summarized as follows : 1 . The differences among the extractive rate and nematicidal activities of the extracts with cold dip and blitzkrieg extraction were not significant .

通过计算死亡率与校正死亡率得出两种活性物质对甜菜夜蛾的触杀和胃毒作用明显，胃毒作用的致死率总体优于触杀作用。

Through the calculating the mortality rate and Adjusted mortality rate we know that two active substances have a obvious function of contact toxicity and stomach toxicity on spodoptera exigua larvae , and the mortality of stomach toxicity is higher than contact toxicity in general .