论文部分内容阅读
本文分二部分。第一部分概述了延安地区栽培方式与粟灰螟发生的关系,指出由虫源的有无多寡,粟灰螟以为害山地粟为主,为害川地粟的主要是玉米螟。第二部分对老的和仍在提倡的三种防治粟灰螟的栽培方法,即:越冬期防治,调节播种期和早播诱杀田进行了探讨,指出了它们在生产上未能大规模推行的原因;并提出了合理倒茬与间苗灭虫两项可供选择的办法和提出这种办法的依据。
This article is divided into two parts. The first part summarizes the relationship between the cultivation methods and the occurrence of the corn borer in Yanan, and points out whether there are many insect sources or not. In the second part, the author discusses three old and still promoting methods for preventing and curing the corn borer, namely, the prevention and control of overwintering period, the adjustment of sowing date and the field of seeding and early sowing, and pointed out that they failed to implement in large-scale production The reasons for this are also proposed. Two reasonable alternatives and the basis for proposing this method are proposed.