论文部分内容阅读
草地螟又叫黄录条螟,属鳞翅目,螟蛾科。为河北省北部地区重要的害虫之一,在坝上各县为害尤甚。在偏重发生年份,农业生产常遭受严重损失。过去对此虫了解不多,近年来我们做了一些工作。本文仅就(一)草地螟的生物学特性。(二)草地螟能否在河北省越冬?(三)草地螟的发生与环境条件的关系三个方面进行初步探讨,现分述如下:(一)草地螟的生物学特性据多年观察,草地螟在河北省张家口,承德二个地区,一年发生二代,主要是一代幼虫为害。二代幼虫发生在8、9月份,此时庄稼即将成熟,秸杆坚实,不喜取食,只要不是在偏重发生年份,一般农田受害不多,主要危害杂草。
Grasshopper also known as yellow log borer, Lepidoptera, Pyralidae family. One of the most important pests in the northern part of Hebei Province, especially in Bashang County. In areas where priority is given to, agricultural production is often severely damaged. We did not know much about this pest in the past and in recent years we have done some work. This article only (a) the biological characteristics of Meadow Borer. (B) whether the grasshopper wintering in Hebei Province? (C) the occurrence of grasshopper and environmental conditions in three aspects of the initial discussion are as follows: (A) the biological characteristics of Meadow Borer According to years of observation, grassland Borer in Zhangjiakou, Hebei Province, Chengde two areas, two generations occur a year, mainly the generation of larvae damage. The second generation of larvae occurred in August and September, when the crop is about to mature and the straw is solid and unpleasant to eat. As long as it is not the year that is most prevalent, the damage to the farmland is generally small and the main hazard to weeds.