loose ends,releasing thread

Medicinal Control of Bursaphelenchus xylophilus;

药剂防治松线虫病的研究

The morphological characters of Zeiraphera lariciana and Zeiraphera grisecana and their ocurrence patterns in Saihanba area;

塞罕坝地区落叶松线小卷蛾、松线小卷蛾的识别与发生规律

With long time observation and analysis,it is found that the following factors are related to the population fluctuation of Zeiraphera lariciana and Zeiraphera grisecana:pupation rate,eclosion rate,sex ratio,oviposition capacity and incubation rate.

通过对落叶松线小卷蛾(Zeiraphera lariciana)、松线小卷蛾(Zeiraphera grisecana)的长期系统观测、分析,定量地得出了影响其种群数量变化的相关因子。