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ISSN : 1225-0171(Print)
ISSN : 2287-545X(Online)
Korean Journal of Applied Entomology Vol.50 No.3 pp.171-178
DOI :

곤충병원세균(Xenorhabdus nematophila, Photorhabdus temperata ssp. temperata)의 대사물질을 이용한 "비티플러스" 생물농약 개발

초록

Development of "Bt-Plus" Biopesticide Using Entomopathogenic Bacterial(Xenorhabdus nematophila, Photorhabdus temperata ssp. temperata) Metabolites

서삼열, 김용균

Abstract

 ,  , Bacillus thuringiensis (Bt) is a bacterial biopesticide against insect pests, mainly lepidopterans. Spodoptera exigua and Plutella xylostella exhibit significant decreases in Bt susceptibility in late larval instars. To enhance Bt pathogenicity, we used a mixture treatment of Bt and other bacterial metabolites which possessed significant immunosuppressive activities. Mixtures of Bt with culture broths of Xenorhabdus nematophila (Xn) or Photorhabdus temperata ssp. temperata (Ptt) significantly enhanced the Bt pathogenicity against late larval instars. Different ratios of Bt to bacterial culture broth had significant pathogenicities against last instar P. xylostella and S. exigua. Five compounds identified from the bacterial culture broth also enhanced Bt pathogenicity. After determining the optimal ratios, the mixture was applied to cabbage infested by late ins tar P. xylostella or S. exigua in greenhouse conditions. A mixture of Bt and Xn culture broth killed 100% of both insect pests when it was sprayed twice, while Bt alone killed less than 80% or 60% of P. xylostella and S. exigua, respectively. Other Bt mixtures, including Ptt culture broth or bacterial metabolites, also significantly increased pathogenicity in the semi-field assays. These results demonstrated that the Bt mixtures collectively names `Bt-Plus` can be developed into potent biopesticides to increase the efficacy of Bt.
Bacillus thuringiensis, Xenorhabdus nematophila, Photorhabdus temperata, subsp. temperata, Plutella xylostella, Spodoptera exigua, Metabolite, Biopesticide, 비티, 곤충병원세균, 배추좀나방, 파밤나방, 대사화합물, 생물농약

Reference

Vol. 40 No. 4 (2022.12)

Journal Abbreviation Korean J. Appl. Entomol.
Frequency Quarterly
Doi Prefix 10.5656/KSAE
Year of Launching 1962
Publisher Korean Society of Applied Entomology
Indexed/Tracked/Covered By