Entomopathogenic fungi have been used to control pest as alternative to chemical pesticide. To kill the pest entomopathogenicfungi penetrate cuticle of pest, reach the hemocoel and utilize nutrient of host pest. Finally fungi kill the host by consumingthe host nutrient and physically damaging the tissues. But these process of fungi to control pest is needed so much timeand this point is a disadvantage for fungi. Therefore we studied other application method of fungi to control pest. Weconducted behavior test of beet armyworm to Isaria fumosoroseus which is high virulent against beet armyworm. Adultof the beet armyworm avoided oviposition at Chinese cabbage treated with I. fumosoroseus compare to control and otherhigh pathogenic isolate, Metarhizium anisopliae and this repellency of I. fumosoroseus lasted for 5days in greenhouse.Behavior of larvae to I. fumosoroseus also investigated with choice and non-choice test. Third to fifth instar larvae detectedand avoided fungi. Repellent behavior of larvae to fungi was more noticeable in younger larvae. This result may be usedto prevent the infestation of moth in crop production.

• Ji Hee Han
• Hye ju Jeong
• Jae Yoon Kim
• Jeong Jun Kim
• Sang Yeob Lee