虫害的经济阈限研究是为提高防治经济效益,减少污染环境的一项极为重要的工作,近年来许多国家都极为重视,苏联在这一方面也做了不少工作,制定出了各种作物害虫的防治指标。由于苏联有很多地区与我们新疆在地理、气候及生产条件上极为相似,因此,他们所制定的防治指际值得借鉴参考。1983年,我们根据苏联的麦蚜防治指标进行了试验,结果如下。 (一)苏联小麦蚜虫的防治指标 麦蚜:小麦孕穗 50％茎上每茎有蚜10头。 抽穗 每穗有蚜5—6 The economic threshold study of pests is an extremely important task for improving economic benefits and reducing environmental pollution. In recent years, many countries attach great importance to the economic development. So far, the Soviet Union has also done a lot of work in this regard and formulated various crops Pest control indicators. Since many areas of the Soviet Union are very similar to ours in Xinjiang in terms of geography, climate and production conditions, they are worthy of reference for reference. In 1983, we conducted a test based on the indicators of wheat aphid control in the Soviet Union. The results are as follows. (A) the Soviet Union wheat aphid control indicators Wheat aphid: wheat booting 50% of the stems per stem of 10 aphids. Ears per aphid 5-6