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采用三角瓶密闭熏蒸法,测试了8种药用植物精油在空仓和实仓模拟条件下对谷蠹成虫的熏蒸活性。结果表明,8种植物精油以八角茴香,小茴香和石菖蒲对试虫的熏杀效果较好,尤以八角茴香精油的熏杀效果最佳。空仓模拟条件下,八角茴香和小茴香精油均对谷蠹成虫表现出很高的熏杀活性,其熏蒸处理3 d后的LC50分别为2.88μL.L-1和4.02μL.L-1。实仓模拟条件下,8种植物精油仅以八角茴香的熏蒸效果较好,其166.67μL.L-1熏蒸处理10 d后试虫的校正死亡率为92.37%,实仓模拟熏蒸处理14 d后的LC50为67.01μL.L-1。
The flask fumigation method was used to test the fumigant activity of eight kinds of medicinal plant essential oils on adults of Rhizoma. The results showed that 8 kinds of plant essential oils of star anise, cumin and Acorus calamus smoked good effect on insects, especially the best effect of the star anise essential oil smoked. Under the simulated conditions, the star anise and cumin essential oil showed high smoked activity against adults of Rhizoctonia solani. The LC50 of the star anise and fennel were 2.88μL.L-1 and 4.02μL.L-1 respectively after 3 days of fumigation. Under the simulated conditions of real storehouse, the fumigant effect of 8 kinds of plant essential oil was better than that of star anise only. The corrected mortality rate of the tested insects was 92.37% after the fumigation treatment of 166.67μL.L-1 for 10 days, The LC50 was 67.01 μL.L-1.