Chemical analysis reveals significant insecticidal and repellent activity of essential oil against T. confusum and others, indicating its potential use in pest management.
The present study determines the chemical profile of Schinus molle L. essential oil and its toxicity and repellent effect on Tribolium confusum , Rhyzopertha dominica and Sitophilus granarius adults. Ninety-seven compounds were identified and the most abundant were ß-eudesmol (5.872%), elemol (9.028%), α-phellandrene (12.104%) and ß-phellandrene (16.613%). The phytochemical analysis of Schinus molle showed the presence of quinones, flavonoids, leucoanthocyan in , steroids and sap o nins. The oil demonstrated an insecticidal activity against Tribolium confusum (LC 50 = 170.30 μL/L), Rhyzopert h a dominica (LC 50 = 174.30 μL/L) and Sitophilus granarius (LC 50 = 241.20 μL/L) at 12h after treatment. T. confusum is the most sensitive to the treatment followed by R. dominica and S. granarius . Contact is the most effective mode of application compared to fumig a tion. Moreover, this essential oil exhibited a repellent activity as a function of the exposure time and concentrations. A selection index (Si) of 0.26, 0.35 and 0.15 with 20 µL/mL concentration was registered, showing the highest repellent activity against T. confusum , R . dominica and S . granarius , respectively.
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Torchane et al. (2025) studied this question.
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