石菖蒲根茎提取物β-细辛醚对谷蠹成虫的毒杀作用

Toxicity of β-asarone Derived from Acorus gramineus Soland against Rhizopertha dominica Fab.

采用药膜法、滤纸药膜选择法和三角瓶药纸熏蒸法分别测定了石菖蒲根茎提取物β-细辛醚(β-asa-rone)对谷蠹(Rhizopertha dominicaFab.)成虫的触杀、驱避及熏蒸作用。结果表明,β-细辛醚对谷蠹成虫具有较好的触杀与熏蒸活性。药膜法159.20μg/cm2浓度触杀处理72 h后对试虫的校正死亡率为100.00%。滤纸药膜选择法157.30、78.65、39.33、19.66μg/cm2剂量处理72 h内的平均驱避率均≥Ⅳ级。三角瓶药纸法166.67μL/L、83.33μL/L熏蒸处理72 h后试虫的校正死亡率分别为98.20%、75.86%。

The contact action, repellency and fumigation action of β-asarone derived from Acorus gramineus Soland. to adult Rhizopertha dorninica Fab. were studied in this paper. The result showed that β-asarone had good bioactivities to adult R. dominica. At 72 h post-treatment,the corrected mortality at 159. 20 μg/cm^2 was 100.00%. The repellence classes of 157. 30,78. 65,39. 33,19. 66 μg/cm^2 were all higher than IV. The corrected knockdown rate of 166.67 μL/L,83.33 μL/L of β-asarone to adult were 98. 20%,75.86% respectively by fumigating at 72 h post-treatment.