DIGITALNA ARHIVA ŠUMARSKOG LISTA
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drvaš i kod nekiha autora X. germanus (Faccoli, Rukalski 2004). Neki autori navode bivoltinost T. signatum (Kovačević 1956), ali istraživanjem feologije potkornjaka drvaša (Franjević 2011.) godine za to nema dokaza. Ranija istraživanja naših vrsta potkornjaka drvaša u kojima je kao atraktivno sredstvo upotrebljavan ETOH, a ulovi su bili slabiji, nisu registrirana druga rojenja T. domesticum ili T. signatum (Jendrijev 2005). Razlog za to treba tražiti u manjoj atraktivnosti korištenih komponenti ETOH u odnosu na Domowit-Trypowit D® u kombinaciji s ETOH korišten u ovom istraživanju. Gledano iz perspektive zaštite hrastove oblovine T. domesticum, iako ne najbrojnija vrsta potkornjaka drvaša u ulovima 2011 godine, a koja dolazi na hrastovoj oblovini, predstavlja indikator početka aktivnosti naše najbrojnije i najznačajnije vrste u hrastovim nizinskim šumama T. signatum, čija aktivnost počinje oko 3 do 4 tjedna nakon T. domesticum (Kovačević 1956). Početak aktivnosti T. domesticum ukazuje na potrebu provođenja mjera zaštite hrastove oblovine ili brzo otpremanje posječene i izrađene hrastove oblovine izvan sastojina. Zahvala Acknowledgements Hrvatskom šumarskom institutu Jastrebarsko i kolegama Maji Popović dipl. inž. šum. i dr. sc. Mladenu Ivankoviću na ustupljenim podacima s meteorološke stanice Spectrum Technologies Inc. Watchdog® Weather Station 2000 Series. Šumariji Jastrebarsko na pomoći prilikom provođenja terenskog dijela istraživanja; upravitelju šumarije Jastrebarsko Milanu Orešković dipl. inž. šum., revirniku Vladimiru Jurjević dipl. inž. šum, lugaru Robertu Boričeviću radnicima šumarije Jastrebarsko. Literatura References Anon., 2012: Cjenik glavnih šumskih proizvoda, Hrvatske šume d.o.o. Bruge, H. 1995: Xylosandrus germanus (Blandford, 1894) [Belg. Sp. Nov.] (Coleoptera Scolytidae). Annales de la Société royale belged’Entomologie, 131: 249–264. Czokajlo, D., B. Hrašovec, M. Pernek, J. Hilszczanski, A.Kolk, S.Teale, J. Wickham, P. Kirsch, 2002: New Lure for the Larger Pine Shoot Beetle, Tomicus piniperda – Attractant/Trap Design Combinations Tested in North America and Europe. Proceedings: Ecology, Survey and Management of Forest Insects. Faccoli, M., J.P. Rukalski, 2004. Invertebrati di una foresta della Pianura Padana Bosco della Fontana, secondo contributo – Conservazione habitat invertebrati, 3/2004: 171–179. HRN EN 1316-1, 1999: Oblo drvo listača – Razvrstavanje po kakvoći – 1. dio: Hrast i bukva (EN 1316-1:1997) Jendrijev, Đ. 2005: Istraživanje pojave i dinamike populacije hrastovih potkornjaka drvaša (Trypodendron spp, Xyleborus spp.) na području đurđevačkih nizinskih šuma. Magistarski rad. Gries, G. 1986: Zur Bedeutung des Reifungsfrasses für die Dispersion des Kupferstechers, Pityogenes chalcographus L., (Coleoptera:Scolytidae). Zeitschrift für Angewandte Zoologie, 73, 267–79. Kovačević, Ž. 1956: Primjenjena entomologija. III. knjiga: Šumski štetnici. Poljoprivredni nakladni zavod. Zagreb. Maksymov, J. K. 1987: Erstmaliger Masasenbefall des Schwarzen Nutzholzborkenkafer Xylosandrus germanus Blandf, in der Schweiz [First mass attack of Xylosandrus germanus in Switzerland]. Schweizerische Zeitschrift fur Forestwesen 138215-227. Petercord, R. 2006: Flight period of the broad-leaved Ambrosia beetle Trypodendron domesticum L. in Luxembourg and Rhineland-Palatinate between 2002 and 2005. IUFRO Working Party 7.03.10 Proceedings of the Workshop 2006, Gmunden/Austria. Pfeffer, A. 1995: Zentral und westpaläarktische Borken und Kernkäfer. Pro Entomologia, c/o Naturhistoriches Museum Basel, 310. Summary: 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. Key words: Trypodendron, EN 1316-1, oak round timber, integrated timber protection. |