Fumigant Effect of Oxygenated Monoterterpenes on adults of Tribolium castaneum (Herbst, 1797) (Coleoptera: Tenebrionidae)

Abstract

The Red flour beetle, Tribolium castaneum (Herbst, 1797) (Coleoptera: Tenebrionidae) is a common insect that attacks stored grains and foods. This insect has a world wide distribution. In this study, fumigant effect of oxygenated monoterpenes (Geranyl acetate, Bornyl acetate, Neryl acetate) was investigated on adults of T.castaneum. The differences of applications were found statistically significant (P≤0.05). Results show
that Neryl acetate had highest fumigant effect on adults of T.castaneum, compared with the negative control. Mortality rate of T. castaneum adults was increased significantly, depending on the concentration levels and exposure times. At 72, 96 hours and 20 (µl/petri) concentration, the highest mortality rates of Neryl acetate, Geranyl acetate and Bornyl acetate were determinated as 70% and 96%, 40% and 83%, 31% and 53%, respectively. Mortality rate of positive control (DDVP) was 100% at least concentration and exposure time. LC50 and LC90 values of Geranyl acetate and Bornyl acetate were calculated as 0.808-1.522, 1.155-2.391 and 1.804- 8.794 (µl/petri) after 96 hours, respectively. Research results suggested that Neryl acetate from the monoterpenes might have potential to be used as fumigant on adults of T. castaneum.