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小麦是郓城县主要的粮食作物,每年种植面积达7.3万hm2。麦蚜是常年发生面积最大、为害最重的一类害虫。从20世纪80年代麦蚜成为麦田害虫优势种群以来,10年中约有9年需要防治,若不能进行有效防治,将给小麦生产带来严重的损失。我们结合多年来预测预报资料和实际防治工作经验,对?
Wheat is the main food crop in Tancheng County, with an annual planting area of 73,000 hm2. Aphids are perennial pests that have the largest area and the worst damage. Since the 1980s, wheat aphids have become dominant pests in wheat fields since 10 years, about 9 years need to prevent and control, if not effective prevention and control, will have a serious loss of wheat production. We combine years of forecast data and actual prevention and control work experience, right?