树干注射法防治海棠树杏球蚧的研究

The Effect of Pesticide to Didesmococcus koreanus Borchs by Injecting Method

选用3种内吸性杀虫剂,分别于2004年5月6日、5月12日、5月18日进行树干注射,每棵树的注射量分别为l2、20、28 mL,对危害海棠树的杏球蚧防效进行了研究。结果表明,不同药剂、不同剂量、不同施药时间之间的防效均有极显著差异,5月6日注入40%乐果(28 mL.棵-1)防效最好,平均防效达到67.17%。

In order to control Didesrnococcus koreanus, 3 pesticides were injected into Malus spectabilis truck at 3 different times, with the dosages of 12 mL, 20 mL and 28 mL per tree respectively. The result showed that the control effects among different pesticides, injection times and dosages were significantly different, the effect of 40% omethoute injected at May 16（ 28 mL/tree） was the best.