落叶松红腹叶蜂食叶量、发育进度及防治适期的研究

掌握科学合理的防治时机，是害虫防治的关键技术之一。为此笔者在对落叶松红腹叶蜂防治技术的研究中，根据落叶松红腹叶蜂幼虫的生物学特性，创新采用拟自然态研究方法、自然产卵小群统计方法，对幼虫每虫和分龄期食叶量(率)、卵和幼虫发育历期、幼虫自然死亡率、越冬幼虫化蛹发育进度及化蛹历期等进行了系统研究。在这些研究的基础上，提出科学的防治适期应为幼虫发育高峰后第7～10d，在此时间内林间可见卵及幼虫约占当年种群数量的76％～90％，是卵和幼虫出现最多的时段，是最大限度地消灭叶蜂幼虫、压低种群数量的有利时期。

Folivorous Amount, Developmental Progress and Suitable Time for Control of Pristipora erichsonii (Htg.)

It is one of key technology for controlling pest to master scientific and rational control time. During the research on technology of controlling Pristipora erichsonii (Htg.), based on biological characteristics of larva of Pristipora erichsonii (Htg.), systematic study have been done on folivorous amount of larva, developmental progress of ova and larva, natural death rate of larva, developmental progress of pupation of hibernating larva and pupation progress by use of paranatural method and statistics method of natural oviposition micropopulation. On the basis of these research, scientific suitable time for control is 7 ~ 10 days after the developmental peak of larva. During this period, ova and larva take up 76% ~ 90% of population quantity in the same year, which a great amount of ova and larva appear. And it is also a favorable period to wipe out larva of Pristipora erichsonii (Htg.) and reduce population quantity.