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2011年我国草地螟具有发生面积小、见虫区域少、虫口密度低、为害程度轻等特点。造成轻发生的原因主要是境内虫源基数小、境外虫源未大规模迁入以及夏季天气生态条件对其发生不利。尽管2011年草地螟发生是自1996年以来的第3个暴发周期内发生最轻的年份,但坚持系统监测、积累虫情资料,对研究草地螟年度发生规律、提高预警能力仍有重要意义。
In 2011, our country had a small area of occurrence of meadow moth, see less insect area, insect population density is low, the degree of damage and so on. The main causes of mild occurrence are mainly the small number of domestic insect sources, large-scale movement of overseas insects, and adverse weather conditions in summer. Although the occurrence of Meadow Stem Borer in 2011 is the lightest in the third outbreak period since 1996, insisting on systematic monitoring and accumulating insect information is still of great significance for studying the annual occurrence of Meadow Stem Borer and improving its early warning capability.