Effects of Some Plant Extracts and Bensultap on Trichoferus griseus (Fabricius, 1792) (Coleoptera: Cerambycidae)

Aqueous extracts prepared from seven plant species, Cyclamen mirabile Hildebr., 1906 (Pirumilaceae), Fritillaria bithynica Baker, 1874 (Liliaceae), Juglans regia L., 1753 (Juglandaceae), Muscari neglectum Guss., 1842 (Liliaceae), Nicotiana tabacum L., 1753 (Solaneceae), Sternbergia candida Mathew and Baytop, 1979 (Amaryllidaceae), Urginea maritima L., 1872 (Liliaceae) were tested for their insecticidal activity against Trichoferus griseus F. (Coleoptera: Cerambycidae) on Pinus brutia L. in the laboratory in 2007. Insecticidal effects of aqueous plant extracts were compared to the application of an insecticide (Bensultap, Bancol 50 WP) and synthetic chemical preservation (chromated copper arsenate, CCA, Tanalith C), which is widely used as a positive control. The effects of those materials on larvae were also analyzed. The bolts have been impregnated with seven aqueous plant extracts and Bensultap and CCA by using a vacuum desicator. Then, larvae of T. griseus were placed on the treated and non-treated bolts. Bensultap was the most effective and more significant in reducing the number of larvae in all the trials when compared to the other treatments. The effects of six plant extracts on the larvae were statistically similar to each other except for U. maritima. The effects of Tanalith C and U.maritima were statistically similar to control. Bensultap would be a welcome addition for the control of wood pests. Aqueous extracts of the six plant species exhibited insecticidal activity are potential candidates as new organic insecticides.