具有杀虫活性的海洋微生物的筛选

以棉铃虫(H.armigera)为初筛试虫,采用常规浸虫和微型筛选法测定采自中国海域的908株海洋微生物的杀虫活性,获得了14株具有杀虫活性的菌株,进一步测定在初筛中具有高杀虫活性的JAAS01菌株浓缩发酵液对棉铃虫、菜青虫(P.linnaeus)、粘虫(L.separata)、小菜蛾(P.xylostella)和菜缢管蚜(R.pseudobrassicae)的室内杀虫活性。结果表明,JAAS01菌株浓缩发酵液对粘虫的杀虫活性最高,达94 36%,对菜青虫和棉铃虫的杀虫活性中等,而对菜缢管蚜和小菜蛾的杀虫活性较低。研究结果显示,从海洋微生物中可筛选出对农业害虫具有杀虫活性的新型微生物资源。

Screening of Marine Microorganisms with Insecticidal Activity

Fourteen strains with insecticidal activity to Heliothis armigera were screened from nine hundred and eight strains of marine microorganisms isolated from waters of South China Sea and East China Sea by dipping pest screening and micro scree-(ning.)The insecticidal activity to different insects of concentrated fermentation broth of strain JAAS01,one of the fourteen strains,with high insecticidal activity was tested indoors.Results showed the fermentation broth had the highest insecticidal activity which was 94.36% to Leucania separata,then to Pierisrapae linnaeus and H.armigera.The insecticidal activity to Rhopalosiphum pseudobrassicae and Plutella xylostella was rather low.Results also showed it was possible to obtain new resource of microorganism with insecticidal activity to pests by screening from the sea.