Centro de Investigación en Biodiversidad y Conservación, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México.
Facultad de Ciencias Biológicas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México.
J Food Prot. 2021 Sep 1;84(9):1524-1527. doi: 10.4315/JFP-21-055.
The insecticidal activity of a Ricinus communis leaf hexane extract and its fractions against adult yellow sugarcane aphids (Sipha flava) was evaluated using a contact bioassay after fumigation. The n-hexane extract at 10,000 ppm achieved the highest mortality (80%); the positive control had 100% mortality and the negative control had only 4% mortality over the 72-h experiment time. Chemical fractionation of the hexane extract of R. communis leaves produced multiple fractions, and 10,000 ppm of the F4 fraction resulted in 92% aphid mortality at 72 h. Gas chromatography-mass spectrometry of the F4 fraction revealed linoleic acid as the major compound (84.5%). The R. communis n-hexane extract and linoleic acid could be used for integrated pest control as an ecologically friendly alternative to synthetic chemical insecticides.
采用熏气接触生物测定法评估蓖麻叶正己烷提取物及其馏分对成年黄甘蔗蚜虫（Sipha flava）的杀虫活性。正己烷提取物在 10000ppm 时达到最高死亡率（80%）；阳性对照在 72 小时实验时间内死亡率为 100%，而阴性对照仅为 4%。对蓖麻叶正己烷提取物进行化学分级分离产生了多个馏分，F4 馏分在 10000ppm 时在 72 小时时导致 92%的蚜虫死亡。F4 馏分的气相色谱-质谱分析显示亚油酸是主要化合物（84.5%）。蓖麻正己烷提取物和亚油酸可作为一种对合成化学杀虫剂具有生态友好替代作用的综合害虫防治手段。
