期刊
JOURNAL OF PEST SCIENCE
卷 86, 期 1, 页码 107-113出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10340-012-0450-1
关键词
Wireworm; Click beetle; Agriotes; Rickettsiella; Legionellales; Beauveria bassiana; Cordyceps; Hypocreales; Entomopathogenic bacteria; Entomopathogenic fungi; Self-splicing group-I intron; gIi-diagnosis
类别
Wireworms, the polyphagous larvae of click beetles belonging to the genus Agriotes (Coleoptera: Elateridae), are severe and widespread agricultural pests affecting numerous crops. Biological control agents and methods for this general pest are highly solicited. In a screening for microbial Agriotes pathogens, an intracellular bacterium and a mitosporic fungus were isolated. Phylogenetic analysis based on ribosomal RNA operon sequences of both micro-organisms corroborated their previous morphology-based taxonomic classification. The bacterial pathogen has been assigned to the taxonomic genus Rickettsiella (Gammaproteobacteria) wherein it represents a new pathotype, 'Rickettsiella agriotidis', that appears most closely related to subjective synonyms of the nomenclatural type species, Rickettsiella popillae. The fungal pathogen has been shown to belong to the form-species Beauveria bassiana, i.e., an obligate anamorph related to the genus Cordyceps (Ascomycota: Hypocreales). Furthermore, the B. bassiana strain from Agriotes has been shown to be potentially susceptible to identification by gIi-diagnosis, i.e., a diagnostic method making use of the strain-specific presence of self-splicing group-I introns within the ribosomal RNA operons of certain hyphomycetous fungi.
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