Varroacidal effi cacies of essential oils extracted from Lavandula offi cinalis, Foeniculum vulgare, and Laurus nobilis in naturally infested honeybee (Apis mellifera L.) colonies

Authors : Figen KÜTÜKOĞLU, Ahmet Onur GİRİŞGİN, Levent AYDIN

Pages : 554-559

View : 19 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :This study was performed to determine the efficacies of Lavandula officinalis, Foeniculum vulgare, and Laurus nobilis essential oils on the control of Varroa destructor insert ignore into journalissuearticles values(Acari: Varroidae);, the most common parasite of honeybees insert ignore into journalissuearticles values(Apis mellifera L.);. Experimental colonies from the province of Bursa, Turkey, were divided into 5 homogeneous groups of 8 hives each. The 3 essential oils plus thymol insert ignore into journalissuearticles values(Thymovar®, an essential oil-based drug with known efficacy that was used for comparison); were applied to 1 group each and 1 group was left untreated as a control. Each group was treated during 3 seasons, 2 consecutive autumns and 1 spring. Efficacies of the essential oils were determined by the Henderson-Tilton formula and the significance between the oils was determined by Tukey`s multiple comparison test. In the first autumn, the highest efficacy was detected in Thymovar insert ignore into journalissuearticles values(79.4%); followed by L. nobilis insert ignore into journalissuearticles values(76.7%);, L. officinalis insert ignore into journalissuearticles values(76.4%);, and F. vulgare insert ignore into journalissuearticles values(74.5%); essential oils. In spring, the efficacy rates were 83.8% in L. officinalis, 81.8% in Thymovar, 78.8% in F. vulgare, and 70.8% in L. nobilis. In the second autumn, the efficacy rates were 78.4% in Thymovar, 76.6% in L. officinalis, 71.9% in F. vulgare, and 65.2% in L. nobilis respectively. No abnormal deaths were seen in adult bees during the treatment period.
Keywords : Key words Efficacy, essential oils, honeybee, Varroa destructor, Turkey