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국내에서 선발한 Bacillus thuringiensis sp. aizawai 균주의 주요 나방류 해충에 대한 살충 활성 및 배양특성
이상계(Sang-Guei Lee),최기현(Kee-Hyun Choi),이영수(Young-Su Lee),오경석(Kyeong Seok Oh),오정훈(Jeung-Hun O),최성원(Sung-Won Choi) 한국농약과학회 2006 농약과학회지 Vol.10 No.2
This experiment was conducted to select prominent microorganisms with a good insecticidal activity among the ten species, which isolated from soil at the near of Chung-buk, Chung-nam, and Gang-won provinces and made protein crystal endotoxin. As a result, GB-413 strain was finally selected, which showed the high insecticidal activity against susceptible diamondback moth (Plutella xylostella), beet army worm (Spodoptera exigua) and tobacco cutworm (Spodoptera litura) as well as resistant diamondback moth strains. By modifying the cultivation process f.g. lowing the glucose concentration at early cultivation stage and adding the carbon after inducing the spores, the percentage of making spore as well as the number of active spore were increased and the time for cultivation and spore forming was reduced without a reduction of insecticidal activity. These results were not only applied successfully for the optimized cultivation process for a fermentation tank containing five tons capacity, but also improved the possibility of mass cultivation for commercial production.