小麦吸浆虫在我县自一九八○年以来回升危害日趋严重。八四年部分田块几乎绝产,重害区大部分田块减产严重。1986—1987年我们对小麦红吸浆虫进行了系统测报,及时地指导了全县二十万亩发生田的防治工作,使我县减少小麦损失12350吨。一、种群变动系统观察1.研究方法及系统田基本情况研究方法:选择有代表性的田块两块(一、二类麦田各一块,面积在一亩左右)。在小麦拔节中期淘土一次,始见旗叶后每5天淘土一次,见蛹后每隔一天淘土一次直至田间成虫羽化结束。每次淘土均取0—10cm 土壤测墒。成虫观察自见中蛹时起在系统田设笼〈30×30×90 Milia nematode in my county since 1980 rise more and more serious harm. Some plots of plots were almost absolutely dead in 1984, and most of the plots in the heavily harvested areas suffered a serious loss. From 1986 to 1987, we systematically reported wheat midges, and promptly guided the prevention and control of 200,000 mu of fields in the county, reducing 12,350 tons of wheat loss in our county. First, the systematic observation of population changes 1. Research methods and systems of basic fields of field research methods: Select a representative of two plots (one or two types of wheat fields each with an area of ​​about 1 acre). Amoeba in the middle of the wheat jointing once, see the flag leaf every 5 days after the earthen once, see the pupa every other day until the end of adult emergence. Amoy each take 0-10cm soil moisture measurement. Adult observations from the pupa in the system when the cage set up in the field <30 × 30 × 90