The ladybird beetles have been used as biological control agents against several pest species. The aim of this study is to evaluate the compatibility between ladybird beetles and an entomopathogenic fungus Beauveria bassiana (Balsamo) Vuillemin AAD16. The virulence of AAD16 strain was compared with that of commercial GHA strain on three developmental stages of two coccinellids; Harmonia axyridis Pallas and Chilocorus stigma Say. The topical application method was used for both adult and larval stage while dipping method was used for egg stage. The LT50 and mycosis rate for all life stages of two ladybird beetles tested were not significant between AAD16 and GHA strain. In larval stage, the mycosis rates of H. axyridis and C. stigma were 36 and 40% and 63 and 60% in AAD16 and GHA strain. In adult stage, the mycosis rates of H. axyridis (male and female) and C. stigma (unsexed) were 20, 23, and 23% and 26, 30, and 30% in AAD16 and GHA strain, respectively. Therefore, the two predatory coccinellids could be compatible with these two fungus strains due to their relatively lower mycosis rate.

• Md. Rajib Hasan(Department of plant medicals, Andong National University, Korea) Corresponding author
• Md. Rasel Raju(Department of plant medicals, Andong National University, Korea)
• Babatunde O. Kehinde(Department of plant medicals, Andong National University, Korea)
• Seongsik Kim(Department of plant medicals, Andong National University, Korea)
• Juhyeok Lee(Department of plant medicals, Andong National University, Korea)
• Tae Guen Song(Department of plant medicals, Andong National University, Korea)
• Un Taek Lim(Department of plant medicals, Andong National University, Korea)