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本文从巴豆中提取农药活性物质 ,并进行了药效初探 ,试验表明 ,巴豆中的农药活性物质对蚜虫具有触杀效果 ,致死中量LD50 (1小时 ) =176 9PPM;LD50 (6小时 ) =5 0 2 PPM ;LD50 (2 4小时 ) =30 2 PPM 。
In this paper, the pesticides active ingredients were extracted from croton, and the efficacy of a preliminary study showed that the pesticides in croton have a contact effect of aphids, lethal dose LD50 (1 hour) = 176 9PPM; LD50 (6 hours) = 5 0 2 PPM; LD50 (2 4 hours) = 30 2 PPM.