Tetranychus kanzawai Kishida (Acari: Tetranychidae) is a major pest on strawberry, reducing both the quality and quantity of fruit production. We compared the virulence of an entomopathogenic fungus Beauveria bassiana (Balsamo) Vuillemin ARP14 with a commercial GHA strain against T. kanzawai. In the laboratory, leaf dipping method was conducted while a one-time spray was carried out on selected planting units in strawberry greenhouse with each fungus strain and Triton X-100 as control. Adult T. kanzawai showed lower LT50 when treated with ARP14 strain compared to GHA in the laboratory. The densities of both adult and nymph mites in the greenhouse were significantly reduced in the treatment of two fungus strains compared to the control. The mycosis rate of T. kanzawai in greenhouse was 97.9% at 14 days when treated with ARP14 strain while it was 85.5% when treated with GHA strain. The results suggest that B. bassiana ARP14 can be an effective mycoinsecticide against T. kanzawai.

• Md. Rasel Raju(Department of Plant Medicals, Andong National University, Korea) Corresponding author
• Babatunde O. Kehinde(Department of Plant Medicals, Andong National University, Korea)
• Md. Rajib Hasan(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)
• Taegeun Song(Department of Plant Medicals, Andong National University, Korea)
• Un Taek Lim(Department of Plant Medicals, Andong National University, Korea)