Characterization in biological traits of entomopathogenic nematodes isolated from North China
文献类型: 外文期刊
第一作者: Ma, Juan
作者: Ma, Juan;Chen, Shulong;Li, Xiuhua;Moens, Maurice;De Clercq, Patrick;Han, Richou;Moens, Maurice
作者机构:
关键词: Entomopathogenic nematode;Environmental stresses;Infectivity;Tolerance;Virulence
期刊名称:JOURNAL OF INVERTEBRATE PATHOLOGY ( 影响因子:2.841; 五年影响因子:3.368 )
ISSN: 0022-2011
年卷期: 2013 年 114 卷 3 期
页码:
收录情况: SCI
摘要: In a series of bioassays, thirty-one isolates that were collected from diverse locations in northern China and the laboratory kept isolate Steinernema carpocapsae All, were compared in order to select superior isolates for biological control of Bradysia odoriphaga. Virulence of the isolates against B. odoriphaga was significantly different among nematode isolates. Tolerance of infective juveniles (IJs) to heat, cold, and desiccation differed significantly among and within species. Strains from S. carpocapsae, S. ceratophorum, S. longicaudum, Heterorhabditis indica, and H. bacteriophora were more heat tolerant than strains from S. feltiae, S. hebeiense, S. monticolum, and H. megidis. Heterorhabditis megidis, H. bacteriophora, and S. carpocapsae showed better cold tolerance than the other species. High desiccation tolerance was recorded for S. carpocapsae, S. hebeiense, and S. ceratophorum. The infectivity of IJ of these species against Galleria mellonella larvae was not significantly different between the treated and non-treated IJ after the nematodes had been exposed to 40 degrees C for 2 h, -5 degrees C for 8 h or 25% glycerin for 72 h. Nematode survival was significantly affected by exposure time and IJ concentration when exposed to 40 degrees C or -5 degrees C. All nematode isolates lost their infectivity against G. mellonella after exposure to -5 degrees C for 16 h, except for H. megidis LFS10, which had a low infectivity of 3.3%. A hierarchical classification analysis classified the isolates in four main clusters. The fourth cluster, composed of 13 isolates, grouped the isolates that scored well for most traits. (C) 2013 Elsevier Inc. All rights reserved.
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