5种外来入侵植物的茎叶提取物对月季长管蚜的触杀效果实验

摘要

采用浸提法，用95％乙醇为溶剂得到紫茎泽兰、薇甘菊、三叶鬼针草、肿柄菊、酢浆草5种外来入侵植物的茎叶提取物。将植物提取物稀释成1、5、10倍液，在室内用微量点滴法，测定其于24 h、48 h、72 h内对月季长管蚜的触杀效果。结果表明，紫茎泽兰和薇甘菊对月季长管蚜的触杀效果明显高于三叶鬼针草、肿柄菊和酢浆草；5种植物提取物的触杀效果在不同浓度梯度上都无显著差异；肿柄菊植物提取物对月季长管蚜的触杀效果在时间上有极显著差异，其他4种的触杀效果在时间上呈显著差异，都在0～24 h内触杀效果最好。%By using 95 % ethyl alcohol , stems and leaves extract from Eupatorium adenophorum, Mikania mi-crantha, Bidens pilosa, Tithonia diversifolfa, Oxalis corniculata were extracted.Every kind of extract was diluted to 3 concentrations of 1, 5 and 10 times.The bioassays of contact toxicity on M.rosivorum were tested by micro-drip at 24 h, 48 h and 72 h in laboratory .The results indicated that the contact toxicity on Eupatorium adenopho-rum, Mikania micrantha apparently higher than the others , contact toxicity of the five plant extracts showed no sig-nificant difference in different concentration , contact toxicity of Tithonia diversifolfa showed extremely significant difference in different time , and the other 4 invasive plants showed significant difference .