Šumarski list, Vol. 137 No. 9-10, 2013.
Prethodno priopćenje
BIVOLTINISM OF EUROPEAN HARDWOOD AMBROSIA BEETLE Trypodendron domesticum IN CROATIAN LOWLAND OAK STANDS OF JASTREBARSKI LUGOVI
Milivoj Franjević
; Šumarski fakultet Sveučilišta u Zagrebu
Sažetak
Ambrosia beetles are important technical pests that reduce economical value of oak timber. In Croatian oak stands earliest species T. domesticum starts its activity in early January. Monitoring of ambrosia beetles phenology with 5 IPM Tech Intercept panel traps completed with pheromones was conducted from beginning of January till early June. Data collecting for correlation between beetle swarming, mean minimal and maximal weekly temperatures was accomplished with use of Spectrum Technologies Inc. Watchdog® Weather Station 2000 Series. It was established that activity of T. domesticum starts when daily temperatures rise above 9°C. This early swarming often surprises foresters during winter harvesting and causes economical losses due to strict EN 1316-1 for round oak timber or Croatian HRN norms for oak round timber. First swarming lasts till and of March, interrupted by cold periods an bad weather. Second swarming was established in end of April with culmination in mid May. It is obvious that eggs laid in early January had time to reach imaginal stage till early/mid May when our panel traps registered second swarming. This is important conclusion because older entomological literature for Croatia mentioned only one swarming analogous with T. signatum. Knowledge about phenology of ambrosia beetle species is crucial in integrated oak timber protection regarding economical importance of these technical pests.
Ključne riječi
Trypodendron; EN 1316-1; oak round timber; integrated timber protection
Hrčak ID:
111639
URI
Datum izdavanja:
31.10.2013.
Posjeta: 1.263 *