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Insect Growth Inhibition and Antifeedant Activity of Culture Filtrate Extracts of Bacillus licheniformis

机译:地衣芽孢杆菌培养滤液提取物的昆虫生长抑制和拒食活性

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摘要

Cell free culture filtrate of Bacillus llcheniformis isolated from rhizosphere soil of a healthy tomato plant was extracted with ethanol, methanol, ethyl acetate, dichloromethane and hexane. After removal of solvents these extracts were tested for antifeedant and insect growth activity against 3rd instars larvae of Helicoverpa armigera. Maximum antifeedant activity was exhibited by ethanol extract (Al_(50)= 0.019%) and minimum by hexane extract (0.088 %). The larval mortality ranged from 10.0-70.0% in different extracts. Two polar metabolites separated from ethanol extract showed Al_(50) of 0.015 and 0.053%.
机译:用乙醇,甲醇,乙酸乙酯,二氯甲烷和己烷提取从健康番茄植物根际土壤中分离的芽孢杆菌的无细胞培养滤液。除去溶剂后,测试这些提取物对棉铃虫三龄幼虫的拒食和昆虫生长活性。乙醇提取物(Al_(50)= 0.019%)表现出最大的拒食活性,而己烷提取物表现出最小的拒食活性(0.088%)。不同提取物中的幼虫死亡率为10.0-70.0%。从乙醇提取物中分离出的两种极性代谢产物显示Al_(50)为0.015和0.053%。

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