Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Noria Alta S/N, Guanajuato, Gto., 36050.
Red de Estudios Moleculares Avanzados, Instituto de Ecología AC, Carretera Antigua a Coatepec 351, El Haya, Xalapa, Ver., 91070, México.
Chem Biodivers. 2024 Feb;21(2):e202301279. doi: 10.1002/cbdv.202301279. Epub 2024 Jan 22.
For years, crop protection from pest attack, has been dominated by the use of synthetic insecticides. However, many of them can cause severe environmental problems and human health. In this context, the use of plant extracts constitutes an alternative to avoid this kind of contaminants. In this work, we investigated the chemical constituents and insecticidal activity of different extracts of leaves and stems of Argemone ochroleuca Sweet (Papaveraceae) against three economically important pests Sitophilos zeamais (Coleoptera:Curculionidae), Galleria mellonella (Lepidoptera:Pyralidae) and Xyleborus ferrugineus (Coleoptera:Scolytidae). A GC-MS analysis mostly revealed the presence benzylisoquinoline alkaloids such as allocryptopine, protopine, among others. For the insecticidal activity, after nine hours of contact, the methanolic leaves extract showed a 100 % of mortality, followed by the dichloromethane stems extract with up to 93 % of mortality. The results suggest that the benzylisoquinoline alkaloids are involved in the insecticidal activity through the octopaminergic system of the tested insects.
多年来，防治作物病虫害一直以合成杀虫剂为主。然而，其中许多杀虫剂会造成严重的环境问题和人类健康问题。在这种情况下，使用植物提取物可以作为避免此类污染物的替代方法。在这项工作中，我们研究了 Argemone ochroleuca Sweet（罂粟科）叶和茎的不同提取物对三种重要经济害虫玉米象（鞘翅目：象甲科）、黄粉甲（鳞翅目：螟蛾科）和锈色粒肩天牛（鞘翅目：吉丁科）的化学成分和杀虫活性。GC-MS 分析主要揭示了存在苯并异喹啉生物碱，如阿枯米定、原阿枯米定等。对于杀虫活性，接触九小时后，甲醇叶提取物表现出 100%的死亡率，其次是二氯甲烷茎提取物，死亡率高达 93%。结果表明，苯并异喹啉生物碱通过测试昆虫的章鱼胺能系统参与杀虫活性。
