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储粮害虫是影响储粮安全的重要因素。本研究采用水蒸馏法提取的孜然精油处理玉米象(Sitophilus zeamais),谷蠹(Rhizopertha dominica)和长角扁谷盗(Cryptolestes pusillus)三种储粮害虫,测定了孜然精油的趋避,熏蒸及触杀活性,确定了熏蒸活性的半致死浓度LC_(50)和半致死时间LT_(50)。结果表明,孜然精油对三种储粮害虫均具有良好的控制效果,但三种控制作用随昆虫种类的不同存在差异,C.pusillus对趋避和熏蒸作用最敏感,明显高于其他两种试虫,但在触杀实验中R.dominica对孜然精油表现最敏感。
Stored grain pests are important factors that affect the safety of stored grain. In this study, three kinds of stored grain pests such as Sitophilus zeamais, Rhizopertha dominica and Cryptolestes pusillus were treated with cumin essential oil extracted by water distillation. And the contact activity, the semi-lethal LC 50 of the fumigant activity and the LT 50 of the lethality were determined. The results showed that cumin oil had good control effects on three kinds of stored grain pests, but the three control effects differed with the insect species, and C.pusillus was the most sensitive to evade and fumigate, which was obviously higher than the other two kinds of pests However, R.dominica is the most sensitive to cumin oil in contact test.