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Natural occurrence of entomopathogenic nematodes in North China

文献类型： 外文期刊

作者： Ma, Juan 1 ; Chen, Shulong 1 ; Zou, Yaxin 1 ; Li, Xiuhua 1 ; Han, Richou 2 ; De Clercq, Patrick 3 ; Moens, Maurice 3 ;

作者机构： 1.Hebei Acad Agr & Forestry Sci, IPM Ctr Hebei Prov, Inst Plant Protect, Baoding 071000, Peoples R China

2.Guangdong Entomol Inst, Guangzhou 510260, Guangdong, Peoples R China

3.Univ Ghent, Dept Crop Protect, B-9000 Ghent, Belgium

4.Inst Agr & Fisheries Res, B-9820 Merelbeke, Belgium

关键词： species diversity;climatic condition;species distribution

期刊名称：RUSSIAN JOURNAL OF NEMATOLOGY （ 影响因子：0.286； 五年影响因子：0.464 ）

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收录情况： SCI

摘要： The diversity and distribution of entomopathogenic nematodes (EPN) in North China was studied during 2007 and 2008. A total of 2780 soil samples were taken from six provinces (Shanxi, Henan, Jilin, Liaoning, Heilongjiang and Inner Mongolia). Two hundred and five sites were positive for the occurrence of EPN; 103 isolates were steinernematids and 102 isolates were heterorhabditids. Morphological, morphometric and molecular data were used to identify the nematode species. Seven species of Steinerematidae were found: Steinernema feltiae (Filipjev, 1934) Wouts, Mracek, Gerdin & Bedding, 1982, S. ceratophorum Jian, Reid & Hunt,1997, S. longicaudum Shen & Wang, 1992, S. litorale Yoshida,2004, S. hebeiense Chen, Li, Yan, Spiridonov & Moens, 2006, S. carpocapsae (Weiser, 1955) Wouts, Mracek, Gerdin & Bedding, 1982, and S. monticolum Stock, Choo & Kaya, 1997. Three Heterorhabditis species were obtained: i.e., Heterorhabditis bacteriophora Poinar, 1976, H. megidis Poinar, Jackson & Klein, 1987, and H. indica Poinar, Karunakar & David, 1992. There were also three undescribed Steinernema species which were distinct from known steinernematids in morphological, morphometric and molecular characteristics. According to the morphological traits of their IJ and males, these three species should be classified in the S. feltiae group. The EPN were recovered from a wide range of habitats including both natural and agricultural habitats. Nematodes were isolated from plain areas (38 m elevation) to high altitude areas (1723 m). The survey indicated that the occurrence of different nematode species was strongly associated to the prevailing climatic conditions, altitude, vegetation and soil types.

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