Repellent effect of the caraway Carum carvi L. on the rice weevil Sitophilus oryzae L. (Coleoptera, Curculionidae)
Abstract ObjectiveThe aim of the study was to check whether Carum carvi L. essential oil and L-carvone act on Sitophilus oryzae L. as repellents and/or insecticides, in what concentrations and after what time. ResultsCaraway essential oil and L-carvone the highest repellency showed not in the highest concentrations used in the tests (1%), but in lower concentrations, respectively 0.5% and 0.1%. Caraway essential oil in all used concentrations showed repellent effects on S. oryzae. The highest repellency (60-98%) caused caraway essential oil in concentration 0.5% after 1, 2, 3, 4 and 5 h of the research. The highest repellence of L-carvone (16-100%) resulted in concentration 0.1%. The highest mortality of S. oryzae caused 0.5% caraway essential oil.