Dey Sudip, Sinha Bikramjit, Kalita Jatin
Electron Microscopy Division, Sophisticated Analytical Instrument Facility, North Eastern Hill University, Laitumkhrah, Shillong-793003, Meghalaya, India.
Microsc Res Tech. 2005 Jan 1;66(1):31-6. doi: 10.1002/jemt.20140.
Scanning electron microscopic study revealed some remarkable adverse effects of Eupatorium adenophorum Spreng leaf extract on cuticular and antennal sensilla of the mustard aphid, Lipaphis erysimi Kalt. The study appears to be the first of its kind in providing evidence on toxic property of the plant on certain agricultural pests, although the indigenous tribes of the region know the insecticidal property of the plant for a long time. The study further provides indications regarding the neurotoxic nature of the leaf extract since it has caused abnormalities in the sensory structures. The presence of prominent swellings in some sensilla and shrinkage in others suggests that the leaf extract affects different systems through different mechanisms. The possible use of the plant as a potential biopesticide against certain insect pests is discussed.
扫描电子显微镜研究揭示了紫茎泽兰叶提取物对芥菜蚜（Lipaphis erysimi Kalt）的表皮和触角感器有一些显著的不良影响。该研究似乎是同类研究中的首例，为该植物对某些农业害虫的毒性特性提供了证据，尽管该地区的土著部落早就知道该植物的杀虫特性。该研究进一步表明了叶提取物的神经毒性，因为它已导致感觉结构出现异常。一些感器中出现明显肿胀而另一些则出现萎缩，这表明叶提取物通过不同机制影响不同系统。文中还讨论了该植物作为针对某些害虫的潜在生物杀虫剂的可能用途。
