Abstract
The use of mycoinsecticides can be an alternative to reduce chemical pollution in human dwellings. The use of Beauveria bassiana and Metarhizium anisopliae is gradually increasing, reaching commercial scale in such countries as Brazil, China, and Mexico. At the same time, significant progress has been made in understanding the molecular aspects of pathogenesis, allowing the selection of highly effective fungal strains. Differences in the susceptibility of adults and nymphs of the German cockroach Blattella germanica L. to entomopathogenic fungi was shown. The possibility of enhancing the pathogenicity of various types of fungi when integrated with insecticides in sublethal doses is considered. The German cockroach has evolved many physical barriers, behavioral traits, and physiological mechanisms that prevent infection by various entomopathogens. These barriers include the outer cuticle, inner cuticle, digestive tract and peritrophic membrane, and immunological barriers. Fungal conidia entering the cockroach’s digestive tract was inactivated by a combination of antimicrobial compounds produced by the cockroach and commensal microorganisms, intestinal pH and digestive enzymes. The microbiota of Bl.?germanica may play a critical role in protecting cockroaches from fungal invasion and colonization. Keywords: insecticide resistance, Blattella germanica, Beauveria bassiana, Metarhizium anisopliae, mycoinsecticides, entomopathogenic fungi.
Published Version
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