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ŠUMARSKI LIST 7-8/2013 str. 37     <-- 37 -->        PDF

CompariSON of all season and STANDARD type of ECOLURE® dispenser EFFICACY IN TRAP CATCHES OF EUROPAEAN SPRUCE BARK BEETLE (Ips typographus (L.))
USPOREDBA UČINKOVITOSTI CIJELOSEZONSKOG I STANDARDNOG FEROMONA ECOLURE® U ULOVIMA SMREKINOG PISARA (Ips typographus (L.))
Oto Nakládal, Petr ŠENFELD, Milivoj FRANJEVIĆ, Hana UhlÍková
Summary:
I. typographus is the most serious pest of spruce forests in Eurasia. Pheromone traps are usually used in forest protection against this pest. In this study, two types of pheromone dispensers (ECOLURE CLASSIC and ECOLURE MEGA) were compared in terms of its efficiency in 2010. ECOLURE CLASSIC were capturing averagely more beetles in compare of all season dispense ECOLURE MEGA during all season. No statistic difference was recorded only during first 10 days of the season. In the rest of season (next 123 days) the ECOLURE CLASSIC captured statistically more beetles then ECOLURE MEGA. That is why, type and quality of pheromone dispenser significantly influences the number of trapped beetles to the pheromone traps.
Key words: efficiency, pheromone dispenser, ECOLURE, Ips typographus
Introduction
Uvod
The spruce bark beetle Ips typographus is the most damaging insect attacking spruce forests (Picea abies (L., 1753) Karsten, 1881) in Eurasia (Christiansen and Bakke, 1988). With regard to forest protection, the last two decades in Central Europe was marked by the storms "Vivian/Wiebke" in February/March 1990, "Lothar" in December 1999 and "Kyrill" in January 2007. All events were disastrous and gave rise to an enormous propagation of the European spruce bark beetle (Ips typographus /L./) in the affected spruce forests (Engesser et al., 2002; Flot et al., 2002; Schröter et al., 2002; Berec et al.,2013).
Adult beetles of I. typographus emerge from the forest litter and tree bark on warm spring days and fly to stressed host trees. These bark beetles use an aggregation pheromone to attract more individuals of the same species to the tree for the purpose of weakening the tree and mating. The pheromone attracts both sexes. The attracted males join the attack