The effect of collecting fluid on the catch results of Hylobius abietis in pitfall traps
Institute of Forestry and Rural Engineering, Estonian University of Life Sciences,Kreutzwaldi St. 5, 51014 Tartu, Estonia; e-mail: firstname.lastname@example.org
Two different collecting and killing agents – ethylene glycol and water – were tested in pitfall traps used for trapping adults of the large pine weevil, Hylobius abietis (L.) in clear-felled areas of a massive pine-dominated forest in southern Estonia. The traps were baited with a blend of turpentine and ethanol and filled with a 50%-water-solution of ethylene glycol or clean water without any ingredients and were established in fresh or one-year-old clear-cuttings. During the two-year experiment, 5952 individuals of the pine weevil were caught, of which 50.5% were female and 49.5% male. No significant differences were observed either in the total catch results or in the sex ratios of the pine weevil between the traps filled with ethylene glycol or water.