31种热带植物乙醇提取物对朱砂叶螨的生物活性研究

Study on the Bioactivity of the Alcohol Extracts of 31 Tropical Plants Against Tetranychus cinnabarinus

室内测定31种植物乙醇提取物对朱砂叶螨的触杀和驱避作用。结果表明,大山芝麻、蜂巢草、仔榄树和许树乙醇提取物对朱砂叶螨具有明显的触杀作用,24 h后平均校正死亡率达80%以上,其中大山芝麻的触杀效果最好,高达96.35%;23种植物提取物对朱砂叶螨产卵驱避作用显著,平均驱避率达90%以上;牛筋果、云南野桐、多花瓜腹木、黄椿木姜、酒饼簕和毛瓣鸡血藤提取物对成螨驱避作用明显且较为稳定,48 h的平均驱避率达91%以上。

The contact activity and repellent effect of the alcohol extracts of 31 tropical plants against Tetranychus cinnabarinus was studied. The results showed that the extract of Helicteres lanceolata DC., Leucas aspera Link, Hunteria zeylanica Gard. Ex Thw. and Clerodendrum inerme Gaertn. had obvious contact activity to adult T. cinnabarinus. The average corrected mortalities rates were all above 80% after 24 hours, and the extract of Helicteres lanceolata DC.had the highest contact activity among the extracts tested, with the average corrected mortality being 96.35%. The extracts of other 23 plants had significant repellent effect on the ovipoisition of T. cinnabarinus and the average repellent rates were above 90%. The extracts of Harrisonia perforata Merr., Mallotus yunnanensis Pax et Hoffm., Fissistigna polyanthum Merr., Litsea variabilis Hemsl., Atalantia buxifolia Oliv. and Millettia lasiopetala Merr. had obvious repellent effect to adult T. cinnabarinus., and the average repellent rates were above 91% after 48 hours.