| 曾娟*，姜玉英.我国2012年草地螟发生特点与原因分析[J].植物保护,2014,40(1):142-148. |
| 我国2012年草地螟发生特点与原因分析 |
| Occurrence characteristics and causes of the meadow moth Loxostege sticticalis in China in 2012 |
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| DOI： |
| 中文关键词: 草地螟 轻发年份 发生特点 虫源基数 气候条件 |
| 英文关键词:meadow moth mild occurrence occurrence characteristics insect resource climate condition |
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| 中文摘要: |
| 为探明草地螟轻发年份的发生特点和主导因素，对2012年全国8省70余个监测点的草地螟虫情调查资料进行了系统分析。2012年我国草地螟的总体发生面积小、程度轻，但区域差异明显，其中新疆北疆一代幼虫大范围严重发生，山西北部局部二代幼虫集中为害。导致轻发生的内在因素是境内外有效虫源基数小；外在因素是春夏季气候条件不利，具体表现为春末夏初气温偏低不利于越冬代成虫羽化，气温偏低地区湿度过大不利于成虫产卵，夏季中后期降水分布与一代成虫和二代幼虫发生期不匹配。 |
| 英文摘要: |
| In order to reveal the characteristics and dominating causes of mild occurrence of the meadow moth Loxostege sticticalis L. in China, field investigation and observation data of 70 monitoring sites in 8 provinces were collected and analyzed comprehensively. It indicated that occurrence of the meadow moth in China in 2012 was characterized by a generally mild degree and relatively serious damage in the vast north of Xinjiang in the 1st generation and part of northern Shanxi in the 2nd generation of larvae. The intrinsic factor causing mild occurrence was small source of overwintering generation both in domestic base and near the northern border in 2011. Meanwhile, the important extrinsic factor was adverse spatial and temporal distribution of climatic conditions in spring and summer, including lower temperature during late spring and early summer, which was disadvantageous for adult emergence of the overwintering generation; excessive high humidity in the cooler places, which depressed oviposition; and the mismatching between rainfalls in mid and late summer and emergence of the 1st generation adults and the 2nd generation larvae. |
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