title: Toxicity of entomopathogenic fungi, Beauveria bassiana and Lecanicillium muscarium against a field-collected strain of the German cockroach Blattella germanica (L.) (Dictyoptera: Blattellidae).
abstract: The German cockroach, Blattella germanica (L.) has been recognized as a serious health problem throughout the world. Control failures due to insecticide resistance and chemical contamination of environment have led some researchers focus on the other alternative strategy controls. Microbial insecticides such as those containing entomo pathogenic fungi could be of high significance. Lecanicillium muscarium and Beauveria bassiana grow naturally in soils throughout the world and act as a parasite on various arthropod species, causing white muscardine disease. Thus, these two species could be considered as entomopathogenic fungi. The current study conducted to evaluate the toxicity of Beauveria bassiana and Lecanicillium muscarium against German cockroach, Blattella germanica. Conidial formulations of L. muscarium (PTCC 5184) and B. bassiana (PTCC5197) were prepared in aqueous suspensions with Tween 20. Bioassays were performed using two methods including submersion of cockroaches in conidial suspension and baiting. Data were analyzed by Probit program and LC50 and LC90 were estimated. The obtained results indicated that both fungi species were toxic against German cockroach however; Beauveria bassiana was significantly 4.8 fold more toxic than L. muscarium against German cockroach using submersion method.
authors.affiliation: Department of Medical Entomology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran; Kurdistan Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.
authors.forename: B
authors.initials: B
authors.lastname: Davari
authors.affiliation: School of Public Health, Research Center for Environmental Determinants of Health (RCEDH), Kermanshah University of Medical Sciences, Kermanshah, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Limoee
authors.affiliation: Department of Medical Mycology and Parasitology, Kurdistan University of Medical Sciences, Sanandaj, Iran; Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: S
authors.initials: S
authors.lastname: Khodavaisy
authors.affiliation: Department of Medical Parasitology and Mycology, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran.
authors.forename: G
authors.initials: G
authors.lastname: Zamini
authors.affiliation: Department of Parasitology and Mycology, Tehran University of Medical Sciences, Tehran, Iran; Isfahan National Institute of Health Research, Isfahan, Iran.
authors.forename: S
authors.initials: S
authors.lastname: Izadi
mesh_terms: D000818:Animals; D001681:Biological Assay; D020048:Blattellidae / Q000382:microbiology* / Q000502:physiology*; D005260:Female; D006999:Hypocreales / Q000254:growth & development*; D007300:Insect Control / Q000379:methods; D008297:Male; D010572:Pest Control, Biological / Q000379:methods; D016019:Survival Analysis