Insecticidal Activity of Metarhizium anisopliae FT83 against the Different Stages of Beet Armyworm, Spodoptera exigua
곤충병원성 곰팡이 Metarhizium anisopliae FT83의 파밤나방 생육단계별 살충활성

Ji Hee Han, Jeong Jun Kim, SangYeob Lee
2014 The Korean Journal of Pesticide Science  
The beet armyworm, Spodoptera exigua is pest which is difficult to control. For eco-friendly beet armyworm managements, we isolated entomopathogenic fungi from soil samples by insect-bait method using Tenebrio molitor and conducted bioassay to larvae of beet armyworm. The result of bioassay, a selected strain Metarhizium anisopliae FT83 caused 100% mortality against first~third instar larva of S. exigua at 1 × 10 8 conidia/ml and medial lethal time (LT 50 ) were 0.5 days, 2.6 days and 2.5 days
more » ... days and 2.5 days respectively. Mortality against fourth and fifth larvae were 83.3 ± 6.2% and 86.0 ± 5.7% and medial lethal time (LT 50 ) were 4.2 days and 3.6 days respectively. Mortality against pupae and eggs of S. exigua were 100%. M. anisopliae FT83 showed high virulence at all developmental stages of S. exigua.
doi:10.7585/kjps.2014.18.4.417 fatcat:oqd5ouiq2rgnjftu2lgvktts5q