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http://dx.doi.org/10.7585/kjps.2014.18.4.417

Insecticidal Activity of Metarhizium anisopliae FT83 against the Different Stages of Beet Armyworm, Spodoptera exigua  

Han, Ji Hee (Agricultural Microbiology Division, National Academy of Agricultural Science, RDA)
Kim, Jeong Jun (Agricultural Microbiology Division, National Academy of Agricultural Science, RDA)
Lee, SangYeob (Agricultural Microbiology Division, National Academy of Agricultural Science, RDA)
Publication Information
The Korean Journal of Pesticide Science / v.18, no.4, 2014 , pp. 417-421 More about this Journal
Abstract
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 $1{\times}10^8conidia/ml$ and medial lethal time ($LT_{50}$) were 0.5 days, 2.6 days and 2.5 days respectively. Mortality against fourth and fifth larvae were $83.3{\pm}6.2%$ and $86.0{\pm}5.7%$ 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.
Keywords
Entomopathogenic fungi; Metarhizium anisopliae; beet armyworm; Spodoptera exigua;
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Times Cited By KSCI : 4  (Citation Analysis)
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