The two-spotted spider mite, Tetranychus urticae, is one of the most important pests of crops. However, chemical acaricides are not always effective and their continuous use has resulted in resistance among two-spotted spider mite populations. To reduce or replace use of chemical acaricides, the entomopathogenic fungi having acaricidal activity were investigated. As results, 12 isolates could be selected from 342 isolates of fungi against two-spotted spider mite. To show the multiple roles of entomopathogenic fungi against plant pathogen, the antimicrobial activity of selected 12 isolates were evaluated to plant pathogenic bacterium Ralstonia solanacearum and fungus Botrytis cinerea. Various antimicrobial activities were observed against these plant pathogens. Consequently, these entomopathogenic fungi would be offered an alternative for dual control agents against the two-spotted spider mite and plant diseases.

• Hwi Geon Yun(Department of Agricultural Biology, College of Agriculture, Life & Environment Science, Chungbuk National University)
• Dong Jun kim(Department of Agricultural Biology, College of Agriculture, Life & Environment Science, Chungbuk National University)
• In Hui Kim(Department of Agricultural Biology, College of Agriculture, Life & Environment Science, Chungbuk National University)
• Won Seok Gwak(Department of Agricultural Biology, College of Agriculture, Life & Environment Science, Chungbuk National University)
• Soo Dong Woo(Department of Agricultural Biology, College of Agriculture, Life & Environment Science, Chungbuk National University)