Research on the Fumigation Activity of Two Plant Essential Oils Against Plodia interpunctlla (Hübner)

The fumigation activity and effect of adults and larvae of Plodia interpunctella (Hübener) with Lavandula angustifolia Mill oil and Ocimum basilicum oil on under indoor conditions was studied. The fumigation effect of Lavandula angustifolia Mill oil and Ocimum basilicum oil on adults and larvae of Plodia interpunctella (Hübener) was determined by a closed air filter paper fumigation method. Sublethal doses of Lavandula angustifolia Mill oil and Ocimum basilicum oil on fumigation of adults and larvae of Plodia interpunctella (Hübener) were analyzed. The results showed that the fumigation effect of Ocimum basilicum oil on Plodia interpunctella (Hübener) larvae was stronger than that of Lavandula angustifolia Mill oil. After treatment with Lavandula angustifolia Mill oil and Ocimum basilicum oil at a concentration of 50 μL for 96 h, the mortality rates of Plodia interpunctella (Hübener) larvae were 92% and 100%, respectively. The mortality rates of adults of Plodia interpunctella (Hübener) treated with Lavandula angustifolia Mill oil and Ocimum basilicum oil were 100% and 83.33% at 3.5 μL for 2 h; When both treated for 2 h, 3.5 μL of Lavandula angustifolia Mill oil led to the highest mortality rate of Plodia interpunctella(Hübener), while 4.5 μL of Ocimum basilicum oil only caused 99.33% of mortality rate of Plodia interpunctella(Hübener). The study showed that the fumigation effect of Ocimum basilicum oil on Plodia interpunctella(Hübener) larvae was significantly higher than that of Lavandula angustifolia Mill oil, and the fumigation effect of Lavandula angustifolia Mill oil on Plodia interpunctella (Hübener) adults was significantly higher than that of Ocimum basilicum oil.