Insecticidal and behavioral effects of some plant essential oils against Sitophilus granarius L. and Tribolium castaneum
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ORIGINAL ARTICLE
Insecticidal and behavioral effects of some plant essential oils against Sitophilus granarius L. and Tribolium castaneum (Herbst) Mehmet Ali Teke1 · Çetin Mutlu2 Received: 18 May 2020 / Accepted: 8 September 2020 © Deutsche Phytomedizinische Gesellschaft 2020
Abstract Insecticidal, repellent and fumigant activities of Rosemary [Rosmarinus officinalis (Lamiaceae)], Daphne [Laurus nobilis (Lauraceae)], Echinacea (Echinacea purpurea (Asteraceae), Marjoram [Origanum majorana (Lamiaceae)], Basil [Ocimum basilicum (Lamiaceae)] and Fennel [Foeniculum vulgare (Apiaceae)] extracts were tested against Sitophilus granarius (Col.: Curculionidae) and Tribolium castaneum (Col.: Tenebrionidae) under laboratory conditions. The composition of essential oils extracted from the plants was also determined. Eucalyptol and Terpinyl acetate were the main components of Daphne oil. Similarly, the main components of Basil oil were Methyl cinnamate, Linalool and Eucalyptol, whereas Camphor and Eucalyptol were the main constituents of Rosemary oil. Likely, γ-Terpinene and β-Terpineol were the main components of Marjoram oil, while Estragole was the main component in Fennel oil. The β-Cubebene and Caryophyllene were the main components of Echinacea oil. Echinacea and Basil oils exhibited high contact toxicity against S. granarius. Basil oil caused 99.59% mortality of S. granarius 24 h after application, whereas Echinacea oil caused 99.59% mortality 72 h after application. In single-dose fumigant toxicity assays, Rosemary oil exhibited 58.41% fumigant activity against S. granarius after 24 h, whereas Fennel oil indicated 100% fumigant toxicity against T. castaneum. All essential oils showed repellent effects against both the pests. The essential oils caused 34.12–95.29% decrease in the progeny production of F1 generation of T. castaneum, while the decrease in the F1 generation of S. granarius ranged between 84.27 and 98.88%. It is concluded that essential oils of Fennel, Rosemary, Echinacea and Basil could potentially be used for the control of studied stored grain pests. Keywords Contact toxicity · Essential oil · Fumigant · Lamiaceae · Repellent · Stored-grain pests
Introduction Turkey is an agricultural country and cereals are among the most important agricultural products of the country (TUIK 2018). Wheat is usually stored in the country due to intensive production; however, a large part of the stored wheat is wasted, and nutritional and market value decreases due to deficiencies in the grain stores (Yıldırım et al. 2001, Karakoç 2006). Harmful insects are the leading factors causing This study was produced from a master thesis project. * Çetin Mutlu [email protected] 1
Republic of Turkey Ministry of Agriculture and Forestry General Directorate of Food and Control, 06800 Ankara, Turkey
Department of Plant Protection, Faculty of Agriculture, Harran University, 63050 Şanlıurfa, Turkey
2
damage to stored products from past to present (Keskin and Özkaya 2013). The amount of insect damage in stored cereals
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