Chemical composition and bioactivity of essential oil against the green peach aphid (Myzus persicae)

In Vivo Bioassay of the Repellent Activity of Caraway Essential Oil against Green Peach Aphid

“…Several authors have underlined that the activity of EOs in high concentrations is repellent and low concentrations-attractant [18,[74][75][76][77][78]. Similar tendencies have been reported by other researchers [27][28][29]57], demonstrating that the same compounds or their mixtures (EOs) can be repellent at a peak concentration but attractant at lower or higher concentrations. The dose-dependent activity of EOs has been observed both in small-scale closed testing systems (petri dishes with filter paper or leaf discs), olfactometers, and open bioassays that include host plants and at various time points after EO application.…”

“…Mentha pulegium and Origanum majorana EO applied at 150 µL per test showed repellent activity of 80.5% and 57.5%, respectively, achieving the highest repellency at 150 min but decreasing afterward [28]. Similar dose-dependent repellency has been demonstrated with Cotula cinerea EO against green peach aphids, showing the repellency change from 48.5% to 64.6% to 37.4% by varying the applied dose from 70 µL to 150 µL to 300 µL [29]. The dose-dependent repellency has also been shown to occur over time: the same applied dose induces progressively different repellency responses [30].…”