浙江省余姚地区松褐天牛的生活世代
Life history of Monochamus alternatus Hope ( Coleoptera: Cerambycidae) in Yuyao city，Zhejiang Province
柳建定1，李百万1，王菊英1，赵宝安1，舒金平2**
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作者单位：1浙江省余姚市森林病虫防治检疫站余姚315400； 2中国林科院亚热带林业研究所富阳311400
中文关键词：松褐天牛，产卵，羽化规律，世代，浙江
英文关键词： Monochamus alternatus，oviposition，emergence，generation，Zhejiang
中文摘要： 松褐天牛Monochamus alternatus Hope是松材线虫( Bursaphelenchus xylophilus)病的主要传播媒介，明确松褐天牛的发生世代及成虫羽化规律对于松材线虫病的防控有着重要意义。本研究利用“塑料薄膜包裹松树树干、定期解除包裹供天牛产卵”的方法，系统研究了余姚地区松褐天牛的产卵规律及成虫的羽化规律。研究结果表明，成虫产卵期为 5月上旬至8月下旬，高峰期出现在6月下旬至8月中旬。松褐天牛在浙江余姚多数为 1年 1代，部分为 2年 1代，95%以上的成虫集中在产卵后的第2年羽化，少数在第3年羽化。成虫自5月上旬开始羽化，高峰期出现在5月中旬到6月中旬，7月中旬羽化基本结束。
英文摘要： Monochamus alternatus Hope is one of the most important insect vectors of the pinewood nematode， Bursaphelenchus xylophilus． Understanding of the life history and biological characteristics ofM． alternatus is thereforevital for the effective management of the pinewood nematode． Eggs ofM． alternatus were collected every ten days fromMay to September． Stems with eggs in them were removed from the tree and placed in rearing cages after counting thenumber of oviposition holes in them．The emergence time of adults was then systemically monitored． The results show thatM． alternatus ，with a peak from late June to mid-August． In Yuyao city， more than 90% ofM． alternatus could complete one generation in one year，but some needed 2 years to finish a completelife cycle． More than 95% ofM． alternatus adults emerged in the year after oviposition by the previous generation but onlya few emerged in the following year．M． alternatus adults emerged from early May to mid-July with a peak from mid-May to mid-June．adults oviposited from early May to late August