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麦水蝇Hdrellia gruseola于早春第一代在我县小麦上发生为害越来越重,1976年全县小麦就有80％以上的面积遭受不同程度的危害。1975年前在迟播麦田受害较重,但1976年在早播麦田也遭到了严重的危害。 经观察,第一代成虫于3月初至4月中旬发生,3月初至4月下旬产卵,幼虫于3月中旬至5月初危害小麦,4月上旬至5月中旬化蛹,5月初开始发生第二代成虫。室内饲养,在日平均温度14.5—17.5℃、相
Hdrellia gruseola, the first generation in the early spring, became more and more harmful to wheat in our county. In 1976, over 80% of wheat in the county suffered different degrees of harm. Before late 1975, the crop was seriously affected by late-cropping wheat fields. However, the early-crop wheat fields were also severely damaged in 1976. It was observed that the first generation of adult worms occurred from early March to mid April and spawned in early March to late April. The larvae harmed wheat from mid March to early May, pupae from early April to mid May, and started to emerge in early May The second generation of adults. Indoor feeding, the average daily temperature 14.5-17.5 ℃, phase