感染松材线虫病松树滑刃目线虫调查

Investigation on Aphelenchida(Nematoda) from pine wood infected with Bursaphe-lenchus xylophilus

本研究首次在全国范围内调查感染松材线虫病松树体内滑刃目线虫的种群组成,包括种类记述和数量组成分析。结果表明:在300份样品中共分离得到10种滑刃目线虫,隶属于3科、4属,其中有2个国内新记录种;它们是松材线虫、拟松材线虫、霍夫曼尼伞滑刃线虫、薄荷滑刃线虫、大核滑刃线虫、小麦长尾线虫(国内新记录种)、爱尔密那长尾线虫(国内新记录种)、李氏长尾线虫、吴氏长尾线虫和外滑刃科线虫一种;描述并且图示比较它们的形态特征。种群数量组成分析表明:松材线虫在感病松树体内占据绝对的优势,削弱了松树线虫群落组成的多样性,即线虫群落结构趋向单一化。研究还表明,利用长尾属线虫的捕食习性来控制中国松材线虫病的流行与危害值得进一步探索与研究。

A nationwide survey for Aphelenchida from pine wood infected with Bursaphelenchus xylophilus （Steiner ＆ Bubrer 1934） Niclde 1970 was conducted in China. The results showed that ten species were found from 300 samples and belonged to four genera of three families based on morphological identification. Which were B. xylophilus, B. mucronatus Mamiya ＆ Enda 1979, B. hofmanni Braasch 1998, Aphelenchoides menthae Lisetzkaya 1971, A. macronucleatus Baranovskaya 1963, Seinura tritica Bajaj ＆ Bhatti 1982, S. elmiraensis （van de Linde, 1938） J. B. Goodey, 1960, S. lii Huang ＆Ye2006, S. wuae Huang ＆Ye 2006 and Ektaphelenchidae sp. , respectively. Among which S. tritica and S. elmiraensis were new records from China. Descriptions and illustrations were provided in the paper. Population variations of these ten species suggested that the pine wood nematode was the dominate species and its occurrence would lead to a significant weakness in diversities of nematodes within pine wood. The results also indicated that further study on biological control potential of Seinura spp. to pine wood nematode was needed in China.