Comparison of effect of four kinds of acaricides against Aceria macrodonis

In order to check control effect of single insecticide against Aceria macrodonis,four kinds of acaricides were selected to implement a field control experiment. The results show that control effects of 1.8% avermectin(EC)diluted 2 000 times,20% clofentezine(SC) diluted 2 000 times,40% pyridaben(WP) diluted 2 000 times and 73%propargite(EC) diluted 2 000 times exist significant differences,and their corresponding control effect on the 21st day after spaying are 92.4%,89.8%,37.8% and 31.8%,respectively. Control effects of repeated spraying 1.8% avermectin(EC) diluted 1 000 times,2 000 times and 4 000 times have significant differences against A. macrodonis,and their control effects after the third spraying are 94.7%,91.7% and 73.8%,respectively.