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doctoral thesis
Nove biotehničke metode integrirane zaštite hrastove oblovine od potkornjaka drvaša
Zagreb: University of Zagreb, Faculty of Forestry, 2012. urn:nbn:hr:108:587560
Franjević, Milivoj
University of Zagreb
Faculty of Forestry and Wood Technology

Institutional repository: University of Zagreb Faculty of Forestry and Wood Technology

Cite this document

Franjević, M. (2012). Nove biotehničke metode integrirane zaštite hrastove oblovine od potkornjaka drvaša (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Forestry and Wood Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:108:587560

Franjević, Milivoj. "Nove biotehničke metode integrirane zaštite hrastove oblovine od potkornjaka drvaša." Doctoral thesis, University of Zagreb, Faculty of Forestry and Wood Technology, 2012. https://urn.nsk.hr/urn:nbn:hr:108:587560

Franjević, Milivoj. "Nove biotehničke metode integrirane zaštite hrastove oblovine od potkornjaka drvaša." Doctoral thesis, University of Zagreb, Faculty of Forestry and Wood Technology, 2012. https://urn.nsk.hr/urn:nbn:hr:108:587560

Franjević, M. (2012). 'Nove biotehničke metode integrirane zaštite hrastove oblovine od potkornjaka drvaša', Doctoral thesis, University of Zagreb, Faculty of Forestry and Wood Technology, accessed 17 February 2025, https://urn.nsk.hr/urn:nbn:hr:108:587560

Franjević M. Nove biotehničke metode integrirane zaštite hrastove oblovine od potkornjaka drvaša [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Forestry and Wood Technology; 2012 [cited 2025 February 17] Available at: https://urn.nsk.hr/urn:nbn:hr:108:587560

M. Franjević, "Nove biotehničke metode integrirane zaštite hrastove oblovine od potkornjaka drvaša", Doctoral thesis, University of Zagreb, Faculty of Forestry and Wood Technology, Zagreb, 2012. Available at: https://urn.nsk.hr/urn:nbn:hr:108:587560

Metadata
TitleNove biotehničke metode integrirane zaštite hrastove oblovine od potkornjaka drvaša
Title (english)Novel biotechnical methods within the integrated protection of oak timber against ambrosia beetles
AuthorMilivoj Franjević
MentorBoris Hrašovec (mentor)
Committee memberJosip Margaletić (predsjednik povjerenstva)
GranterUniversity of Zagreb
Faculty of Forestry and Wood Technology
Zagreb
Defense date and country2012-06-15, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Forestry
Universal decimal classification
(UDC)		630 - Silviculture. Afforestation. Felling. Logging
Abstract
Potkornjaci drvaši su skupina ksilomicetofagnih kornjaša iz porodice Curculionidae koji su važni tehnički štetnici na hrastovoj oblovini. Ekonomski gledano galerije koje stvaraju u drvetu i koje su naseljene ambrozija gljivama i smanjuju vrijednost hrastove oblovine i do nekoliko puta od njene potencijalne, maksimalne tržišne vrijednosti. Hrvatske šume d.o.o kao državno poduzeće koje danas gospodari najvećim dijelom šumskog bogatstva Hrvatske od kojeg 14 % drvne zalihe predstavlja hrast lužnjak, nositelj je FSC certifikata. Metode zaštite hrastove oblovine koje su prije bile dopuštene više nije moguće provoditi sukladno novim, strožim kriterijima zaštite okoliša ove organizacije. U novonastalim okolnostima ukazuje se potreba istraživanja novih metode integrirane zaštite hrastove oblovine. Provedenim istraživanjem testirana su danas dostupna komercijalna sredstva koja se baziraju na naletno barijernim klopkama i olfaktornoj manipulaciji ovom skupinom kukaca pomoću semiokemikalija kao i neka nova tehnološka rješenja u vidu polimernih mreža s mikroinkapsuliranim insekticidima. Istražena je mogućnost učinkovite primjene ovih metoda i tehnologija u integriranoj zaštiti hrastove oblovine. Za pravilnu upotrebu ovih sredstava u integriranoj zaštiti oblovine nužno je dobro poznavanje fenologije potkornjaka drvaša koji pridolaze na hrastovoj oblovini da bi se adekvatne mjere zaštite poduzele u optimalnom trenutku. Istraživanja u ovom radu su pokazala da samo pravovremeno postavljene naletno barijerne klopke mogu ostvariti mjerljivu redukciju populacije potkornjaka drvaša u zoni privlačenja hrastove oblovine. Pretpostavljena repelentnost semiokemikalija koje su simulirale četinjače ili agregacijske semiokemikalije za vrste koje koloniziraju drvo četinjača nisu pokazala repelentni učinak. Bez primjene polimernih mreža izostaje presudni element u zaštiti hrastove oblovine s obzirom na strogost trenuto važećih nHRN i CENN (EN 1316-1) normi koje u najvrednijim klasama za hrastovu oblovinu ne toleriraju ubušenja ovih kornjaša. Višegodišnjim praćenjem populacije potkornjaka drvaša u hrastovim nizinskim sastojinama i istraživanjima na hrastovoj oblovini utvrđena je do danas nepoznata bivoltinost vrste Trypodendron domesticum u našim klimatskim prilikama kao i pojava te ubrzano povećanje populacije alohtone vrste Xyleborus germanus, pridošlica iz Azije koja se tek nedavno u Europi počela pojavljivati kao štetna vrsta. Rezultati istraživanja u tom smislu ukazuju na učinak sekularnih klimatskih promjena, poglavito pojave učestalih kimatskih ekstrema. (visoke zimske temperature) na ovu važnu grupu tehničkih štetnika u šumarstvu. Posljedično, zaključci upućuju na nužnost bolje primjene metoda klasične zaštite kao i dopunu novotestiranim metodama integrirane zaštite visokovrijedne hrastove oblovine.
Abstract (english)
Ambrosia beetles belong to a group of xylomycetophagous insects from the order Coleoptera, family Curcilionidae and are characterized as an important pests of oak timber. Galleries which they form during their life cycle and infect with ''ambrosia fungi'' significantly decrease economical value of oak timber. Hrvatske šume LLC as a state owned company manages FSC certificated forests in which oak is represented with 14 % in overall timber mass. Methods of oak timber protection which in past where implemented are now banned according to FSC criteria of forest protection. In these conditions of forest management it becomes a necesity to introduce novel biotechnical methods of oak timber protection. Available commercial products, flight barrier traps and synthetic semiochemicals and preproduction insecticide treated polymer nets were tested as means of integrated oak timber protection. Implementation of these products was tested in field conditions. Good knowledge of phenology of ambrosia bark beetles and thorough understanding of forest logging operations and conditions that dominate in oak forests is crucial if methods applied are to be effective and taken on time. Field experiments conducted in this research showed that early seasonal deployment of semiochemically baited flight barrier traps can reduce the number of bark beetles that infest oak timber. It was also concluded that without additional protection with polymer nets it is not possible to protect oak timber in regard with strict nHRN and CENN (EN 1316-1) norms for oak timber classes which do not allow any timber infestation in highest quality grades. Semiochemicals used as repellents during the research were ineffective. High risk of infestation is present in the early months of spring for fallen oak timber that is waiting for transport, typically due to organizational reasons. With repeated population monitoring and consecutive trapping of ambrosia beetles in field trials it was found that Trypodendron domesticum has two generations per year in Croatian conditions. Growing population of Asian species Xylosandrus germanus was recorded in one experimental forest. An invasive species established its population in our oak stands within the last decade and is now competing with domestic ambrosia beetles.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:108:587560
Study programmeTitle: POSTGRADUATE UNIVERSITY DOCTORAL STUDY PROGRAMME OF FORESTRY
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti, područje biotehničkih znanosti, polje šumarstvo (doktor/doktorica znanosti, područje biotehničkih znanosti, polje šumarstvo)
Type of resourceText
Extent224
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2017-01-19 14:25:31