论文部分内容阅读
采用甲醇冷浸法和溶剂萃取法,研究了石菖蒲根茎提取物对玉米象和赤拟谷盗的触杀、熏蒸、忌避、种群抑制活性和防治效果。结果表明:石菖蒲甲醇提取物以石油醚萃取物的生物活性最强;石油醚萃取物对玉米象具有较好的触杀、忌避、种群抑制活性和防治效果,药膜法处理72h后对玉米象的LC50和LC95分别为38.54μg/cm2和160.70μg/cm2,滤纸药膜法39.30μg/cm2处理24h后的忌避率为83.83%,饲料拌药法1 000mg/kg处理后对玉米象的种群抑制率、防效与10mg/kg马拉硫磷处理效果差异均不显著;石油醚萃取物对赤拟谷盗具有很高的忌避活性,滤纸药膜法39.30μg/cm2处理72h后对其忌避率为91.17%。
The methanol extracts and solvent extraction methods were used to study the contact, fumigation, repellent, population inhibitory activity and control effects of rhizome of Acorus calamus against corn and elephant tarragon. The results showed that petroleum ether extract had the strongest biological activity with petroleum ether extract, petroleum ether extract had better contact and avoidance, population inhibitory activity and control effect. LC50 and LC95 were 38.54μg / cm2 and 160.70μg / cm2, respectively. The repellent rate of filter paper membrane method after treated with 39.30μg / cm2 for 24h was 83.83% Rate and control effect were not significantly different from those of malathion 10mg / kg. Petroleum ether extract had a very high repellent effect on the red tarragon. The repellent rate was observed after treated with 39.30μg / cm2 for 72h 91.17%.