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Tham khảo luận văn - đề án 'báo cáo lâm nghiệp: "comparison of two types of ecolure lure on ips typographus (l.) (coleoptera: scolytidae)"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | JOURNAL OF FOREST SCIENCE 56 2010 12 609-613 Comparison of two types of ECOLURE lure on Ips typographus L. Coleoptera Scolytidae O. Nakládal1 J. Sova2 ỵ Department of Forest Protection and Game Management Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Prague Czech Republic 2Svatonice Písek Czech Republic ABSTRACT The efficiency of two types of pheromone dispensers ECOLURE classic and ECOLURE tubus was compared in 2008. Pheromone-baited traps were checked 13 times in 10-day intervals this guaranteed the efficiency of ECOLURE tubus all time . ECOLURE classic trapped more beetles on average in all samples. Differences among the first 4 samples checkings were statistically insignificant differences among another 9 samples were significant used statistic tests - two choice t-test a 0.05 from data with normal distribution Wilcoxon matched pairs test in the case of other data distribution . Keywords ECOLURE efficiency Ips typographus pheromone dispenser Ips typographus is one of the most serious pests of spruce stands in Eurasia Bakke 1989 . Using trap trees has always been the basic tool of forest protection against this pest. In the last several decades pheromone traps have replaced trap trees in a massive way. The efficiency of pheromone traps as a measure of forest protection is still discussed by many authors e.g. Dimitri et al. 1992 Lobinger Skatulla 1996 Wichmann Ravn 2001 . It was calculated that using a high density of pheromone traps only 3-10 of the bark beetle population may be trapped Weslien Lindelow 1990 Lobinger Skatulla 1996 . To ensure the right functionality of pheromone traps the traps must be lured by pheromone dispenser. A key component of the bait is cis-verbenol e.g. Jakus Blazenec 2002 . But the number of trapped beetles is strongly dependent on many environmental factors and local conditions such as temperature sun exposure and others Lobinger 1995 . The type of used dispenser is a very important non-environmental
