Evaluation of Drimys winteri (Canelo) Essential Oil as Insecticide against Acanthoscelides obtectus (Coleoptera: Bruchidae) and Aegorhinus superciliosus (Coleoptera: Curculionidae)

Abstract

Adverse effects caused by synthetic pesticides have increased interest in plant-derived insecticidal compounds, in particular essential oils, as a more compatible and ecofriendly alternative for pest control of economic importance. For this reason, the essential oil isolated from leaves and shoots of Drimys winteri (J.R. Forster & G. Forster)—also named canelo (CEO)—was investigated for its chemical profile and insecticidal action against Acanthoscelides obtectus (Say)—one of the most important post-harvest pests of dry beans in the world—and Aegorhinus superciliosus (Guérin)—a significant pest of fruit trees in Chile. The analysis by gas chromatography, paired with mass spectrometry (GC/MS) determined 56 compounds, corresponding to 92.28% of the detected compounds. Elemol (13.54%), γ-eudesmol (11.42%), β-eudesmol (8.49%), α-eudesmol (6.39%), α-pinene (7.92%) and β-pinene (5.17%) were the most abundant. Regarding the bioactivity of the CEO, the results demonstrated toxicological effects against A. obtectus. A concentration of 158.3 µL L−1 had a mortality rate of 94% after 24 h exposure. The LC50 and LC90 values at 24 h were 60.1 and 163.0 µL L−1. Moreover, behavioral bioassays showed a repellent effect against A. superciliosus with a dose of one microliter of CEO. Both sexes of the raspberry weevil stayed for very short times in the treated area with the oil (<0.8 min), showing a homogeneous repellency in the species. The overall data suggest that canelo leaves and shoots essential oil has an insecticide effect and is worth exploring to better understand the synergistic relationship between the compounds present in the essential oil.

The synergistic effects of rosehip oil and matrine against Icerya aegyptiaca (Douglas) (Hemiptera: Coccoidea) and the underlying mechanisms

“…The study and use of essential oils is an interesting and potentially useful tool by which to develop auxiliary insecticides 31 . PEOs have good prospects in the control of scale insects.…”

“…The study and use of essential oils is an interesting and potentially useful tool by which to develop auxiliary insecticides. 31 PEOs have good prospects in the control of scale insects. Ro is an aromatic plant oil rich in bioactive compounds with high value in the food, pharmaceutical and cosmetic industries, 32 but research on its insecticidal activity has rarely been reported.…”

Synthesis and Antibacterial Activity of Manganese-Ferrite/Silver Nanocomposite Combined with Two Essential Oils

“…The GC oven temperature started at 40 • C for 3 min, then increased to 250 • C at a rate of 5 • C/min. This analytical method has been previously validated [28]. Afterward, monoterpenes were identified using a series of alkanes (C 9 -C 18 ) by comparing the experimental and theoretical Kovats indices (KI) of each compound according to the National Institute of Standards and Technology (NIST) library.…”

Phytochemistry and biological properties of Drimys winteriJR et G. Forster var chilensis(DC) A.

“…Both sexes of the raspberry weevil stayed for very short times in the treated area with the oil (<0.8 min), showing a homogeneous repellency in the species. The data suggest that canelo leaves and shoots essentials oils have an insecticide effect (Tampe et al, 2020).…”