CAJ | 학술논문

以桃蚜（Myzus persicae），豌豆蚜（Acyrthosiphon pisum Harris）和白粉虱（Trialeurodes？vaporariorum）作为供试昆虫，对 Sy1 a 菌株粗提液的杀虫活性和总蛋白酶活性进行测定。结果表明：桃蚜取食浓度分别为400、600、1000μg /ml Sy1 a 菌株粗提液48 h 后 LC50值为987．7μg /ml，IC50值为5941．2μg /ml；豌豆蚜取食浓度分别为250、500、1000μg /ml Sy1 a 菌株粗提液36 h 后，LC50值为227．2μg /ml，IC50值为508．3μg /ml；采用浓度为1200．0μg /ml 的 Sy1 a 菌株粗提液处理后7、14和21 d 的温室中白粉虱虫口减退率分别为51．6％、83．7％、89．1％，校正防效分别达到62．0％、88．7％、93．1％。研究结果表明：Sy1 a 菌株粗提液对桃蚜、豌豆蚜及白粉虱等害虫均有显著的防治效果，具有开发成为环境友好型生物农药的前景。
이도아（Myzus persicae），완두아（Acyrthosiphon pisum Harris）화백분슬（Trialeurodes？vaporariorum）작위공시곤충，대 Sy1 a 균주조제액적살충활성화총단백매활성진행측정。결과표명：도아취식농도분별위400、600、1000μg /ml Sy1 a 균주조제액48 h 후 LC50치위987．7μg /ml，IC50치위5941．2μg /ml；완두아취식농도분별위250、500、1000μg /ml Sy1 a 균주조제액36 h 후，LC50치위227．2μg /ml，IC50치위508．3μg /ml；채용농도위1200．0μg /ml 적 Sy1 a 균주조제액처리후7、14화21 d 적온실중백분슬충구감퇴솔분별위51．6％、83．7％、89．1％，교정방효분별체도62．0％、88．7％、93．1％。연구결과표명：Sy1 a 균주조제액대도아、완두아급백분슬등해충균유현저적방치효과，구유개발성위배경우호형생물농약적전경。
We tested the insecticidal activity of crude extract from Xenorhabdus spp.strain Sy1 a towards peach aphids (Myzus persicae),pea aphids (Acyrthosiphon pisum Harris)and whiteflies (Trialeurodes vaporario-rum).The results indicated the LC 50 for mortality and IC 50 for protease activitical inhibition caused by treat-ment of 400,600,1 000 μg /ml crude extract were 987.7 μg /ml and 5 941 .2 μg /ml towards peach aphids at 48 h after feeding;the LC 50 for mortality and IC50 for protease activitical inhibition caused by treatment of 250,500,1000 μg /ml crude extract were 227.2 μg /ml and 508.3 μg /ml towards pea aphids at 36 h after feeding;1 200 μg /ml crude extract led the population reduction of whiteflies in greenhouse to 5 1 .6%, 83.7% and 89.1 % at 7,14 and 21 d after spraying and corrected control efficiency were 62.0%,88.7%and 93.1 %,respectively.The result all above demonstrated that Xenorhabdus spp.strain Sy1 a has a broad applied perspective in biological control towards insect pests in agriculture as a novel biopesticides.