Acaricidal activity of selected essential oils on Rhizoglyphus robini (Acari: Acaridae)
Paper ID : 1120-IPCA4
Hosein Samadiye *1, Jahangir Khajeali2, Hassan Rahimi3
1Isfahan, Hezar Jarib St.Bahar Allay.Block 40
2Associate Professor, Department of Plant Protection, College of Agriculture, Isfahan University of Technology, Isfahan
3Plant Protection Research Department, Khorasan Razavi Agricultural and Natural Resources Research and Education Center, AREEO, Mashhad, Iran.
Rhizoglyphus robini Claparede (Acari: Acaridae) is a mite infesting crops such as saffron, onions, and garlic. In this study, the fumigant toxicity of 26 essential oils was investigated against the adult bulb mites, R. robini. In the preliminary screening tests, 25 adult mites were placed in each Petri dish on a filter paper impregnated with essential oils at a concentration of 7.64 mg/L.a.i, and the mortality was examined after 48 hours. Full dose bioassays were performed on the essential oils with mortality rates higher than 50 percent at 7.64 mg/L.a.i concentration. Twelve essential oils, Rosmarinus officinalis, Ducrosia anethifolia, Citrus sinensis, Myrtus communis, orange, Citrus limon, Lavandula angustifolia, Apium graveolens, Pinus pinaster, Pelargonium graveolens, Artemisia persica, Ferula gummosa and Matricaria chamomilla caused less than 50 percent mortality at a concentration of 7.64 mg/L.a.i Four different concentrations of 14 essential oils were tested and the mean lethal concentrations (LC50s) were determined. Some essential oils showed a relatively high efficacy. The lowest LC50 value was related to the essential oils of Foeniculum valgare with 46.63 mg/L.a.i. The LC50 values of Mentha pulegium, Anethum graveolens L., Heracleum persicum were 82.86, 97.26, 88.20 mg/L.a.i, respectively. Some essensial oils exhibited moderate acaricidal potential such as Daphne odora, Cuminum cyminum L., Trachysperum ammi, Thymus vuldaris L, Artemisia dracunculus L, Mentha piperita, Mentha spicata with LC50 values of 144.29, 103.25, 139.65, 129.87, 130.29, 103, 139, respectively. The essential oils of Satureja hotensis L., Zataria multiflora, and Eucalyptus cinerea showed lower acaricidal activities with 200>LC50>150. In conclusion, some tested essential oils showed excellent acaricidal activities and can be used in the management programs of IPM.
Bulb mite, , Essential oils, Acaricidal activity, Saffron pest, Storage mites
Status : Abstract Accepted (Poster Presentation)