Toxicity of entomopathogenic fungi, Beauveria bassiana and Lecanicillium muscarium against a field-collected strain of the German cockroach Blattella germanica (L.) (Dictyoptera: Blattellidae)
- Author:
Davari, B., Limoee, M., Khodavaisy, S., Zamini, G., Izadi, S.
- Publication Type:Journal Article
- From:Tropical Biomedicine
2015;32(3):463-470
- CountryMalaysia
- Language:English
-
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 entomopathogenic
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.
- Full text:W020151207548297505890.pdf
