【摘要】 以从瑞香狼毒(Stellera chamaejasmeL.)中提取获得天然活性物质1,5-二苯基-1-戊酮、1,5-二苯基-2-烯-1-戊酮为主体成分,研制成生物灭蚜剂(LX-1),对农业上几类重要蚜虫进行了防治应用的初步试验。结果表明,室内对棉蚜和烟蚜的触杀作用24 h的LC50分别为81.73 mg/L和83.32 mg/L;并利用该制剂对棉蚜、烟蚜和麦蚜进行了田间防治试验,施药后3~5天防效达到峰值,2400倍稀释度下,防效达93%~99%,显示了较好的应用前景。更多还原

【Abstract】 The bio-aphidicide LX-1 consists of（1,5）-diphenyl-1-pentanone and（1,5）-diphenyl-2-Penten-1-pentene was separated from Stellera chamaejasme L.The laboratory tests showed that the LC₅₀ of 24h LX-1 for Aphis gossypii G.and Myzus nicotianae B. were 81.73 mg/L and 83.32 mg/L.The control effect of 1/2400 LX-1 in field experiment reached 93%～99% 3～5 days after application.The results have laid a strong foundation for the future aplication.更多还原