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采用三角瓶密闭熏蒸法研究了薄荷油、留兰香油对小麦中玉米象的熏蒸效果及熏蒸毒力。结果表明:在0%,30%,50%,70%的小麦装满度下,2种精油对玉米象成虫均具有较好的熏蒸效果。在小麦装满度70%时,薄荷精油用300μL/L浓度,留兰香精油用350μL/L浓度熏蒸,处理7 d后玉米象成虫的校正死亡率分别达到76.67%和84.17%,LC50值分别为231.50、268.71μL/L。不同粮食装满度时,随着粮食的增加,熏蒸所需要的精油浓度也逐渐增加。小麦对不同精油的吸附率不一样,但小麦占空间体积越大,对精油的吸附就越大。
The fumigation effect and fumigation toxicity of peppermint oil and spearmint oil on the corn in wheat were studied by airtight flask fumigation. The results showed that the two kinds of essential oils had good fumigation effect on adult corn like 0%, 30%, 50% and 70% wheat fullness. At the 70% fullness of wheat, the corrected mortality of adult peppermint corn reached 76.67% and 84.17% respectively after the peppermint oil was fumigated at 300μL / L and Spearmint oil at the concentration of 350μL / L, and the LC50 values were respectively 231.50 and 268.71 μL / L. Different food fullness, with the increase of food, the concentration of essential oils needed for fumigation also gradually increased. The adsorption rate of wheat to different essential oils is different, but the larger the space occupied by wheat, the greater the absorption of essential oils.