摘要
从省工、省时、降低用药量、减少对环境污染等方面考虑,在国槐尺蠖幼虫孵化盛期采用40%久效磷乳油对树干基部注药是防治的最佳期,防治效果达97.8%;在国槐尺蠖的幼虫4龄～5龄时用B t乳剂（细菌性生物杀虫剂）600倍液～800倍液常规喷雾,防治效果达95%以上。
Based on labor-saving,time-saving,cutting down medication,decreasing the pollution of environment,the optimum control time of Semiothisa cineraria should be at the stage of the lags full hatching larvas,by the control of 40 % monocrotophos injected at the base of attacked tree trunk,and control effect reach 97.8 %.At the stage of 4-5 th instar larva,spraying whole tree with 600-800× solution of Bt show better control effect of more than 95 %.
出处
《山西林业科技》
2008年第1期20-21,共2页
Shanxi Forestry Science and Technology
