Intenzitet napada kestenovog moljca minera na području grada Zagreba

master's thesis

• Title (english): The intensity of attack the horse-chestnut leaf miner in the city of Zagreb
• Author: Stjepana Bilić
• Mentor: Aleksandar Mešić (mentor)
• Committee member: Aleksandar Mešić (predsjednik povjerenstva)
• Committee member: Dinka Grubišić (član povjerenstva)
• Committee member: Vesna Židovec (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Agricultural Zoology); Zagreb
• Defense date and country: 2018-02-28, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Kestenov moljac miner (Cameraria ohridella) najznačajniji je štetnik divljeg kestena (Aesculus hippocastanum). Štetnik se pojavljuje u velikim populacijama, zbog velike prilagodljivosti na različite klimatske uvjete i nedostatka prirodnih neprijatelja u budućnosti možemo očekivati njegovu pojavu u svim područjima svijeta gdje raste divlji kesten. Broj generacija uvelike ovisi o klimatskim uvjetima, te na području kontinentalne Hrvatske razvija najčešće tri do četiri generacije godišnje. Za uspješno suzbijanje ovog štetnika vrlo je važna kontrola prve generacije jer se suzbijanjem prve generacije uvelike smanjuje napad, a time i štete budućih generacija. Štete uzrokuju gusjenice koje se hrane i razvijaju unutar lista uzrokujući pritom mine između dva epidermalna sloja. Kod jakog napada lišće smeđi i dolazi do prijevremene defolijacije. Uzastopna višegodišnja rana defolijacija dovodi do fiziološkog slabljenja i konačno do sušenja i ugibanja stabala kestena. Velike su i neizravne štete kao primjerice gubitak hortikulturne vrijednosti. Zbog sve jačih napada ovog štetnika vrlo je važno preventivno, pravovremeno i stručno reagirati kako bi utjecali na očuvanje i opstanak divljeg kestena kod nas.
Istraživanje je provedeno tijekom 2016. godine na pet lokacija u gradu Zagrebu (Maksimirska cesta, Okretište Borongaj, Trg maršala Tita, Tuškanac, Trg dr. Franje Tuđmana). Na svakoj od lokacija vizualno je pregledano po 20 listova/5 stabala pri čemu je bilježen broj mina na temelju kojih je utvrđen intenzitet napada. Rezultati praćenja statistički su obrađeni, te je pritom provedena usporedba intenziteta napada na različitim mikrolokacijama na području grada Zagreba.
Najmanji intenzitet napada zabilježen je na lokaciji Okretište Borongaj 10. svibnja i to 13,1 mina/listu. Najveći intenzitet napada zabilježen na Tuškancu 30. kolovoza s 95,1 mina/listu. Najveće štete uzrokovale su gusjenice treće generacije.

Abstract (english)

The Horse-Chestnut Leaf Miner (Cameraria ohridella) is the most important pest of Horse-Chestnut (Aesculus hippocastanum). A pest appears in large populations, because of great adaptability on the various climatic conditions and the lack of natural enemies we can expect his appearance in the all areas of the world where a horse chestnut is growing. The number of generations depends a lot in climatic conditions, and in the area of continental Croatia most often develops three to four generations per year. For successful suppression this pest the first generation controlling is very important because by suppression of a first generation the attack is significantly reduced, and those also the detriment of the future generations. The damages are caused by caterpillars that feed and develop inside of the leaf causing the mines between the two epidermal layers. In a strong attack leaves are becoming brown and it comes to the early defoliation. Repeatedly multiannual early defoliation leads to physiological fading and finally drying and dying trees of Chestnut. There are also an enormous indirectly damages like e.g. the loss of horticultural values. Because of this pest attacks are getting stronger, it's very important to react preventively, on time and professionally to influence on preservation and survival of Horse Chestnut in this area.
The research has been conducted during 2016 on five locations in Zagreb (Maksimirska cesta, Okretište Borongaj, Trg maršala Tita, Tuškanac, Trg dr. Franje Tuđmana). On each location visually has been inspected per 20 leaves/5 trees, whereby has been recorded the number of mines on the basis of which it was established the intensity of an attack. The results of tracking were statistically processed, and an intensity of attack comparison was performed at different micro locations in the City of Zagreb.
The smallest number of mines (13.1 mines / leaf) was recorded on the site Okretište Borongaj on May 10. The largest number (95.1 mines / leaf) was recorded on Tuškanac on August 30, the highest attacak were registered with third generation on pest.

• Keywords: kestenov moljac miner; divlji kesten; intenzitet napada; vizualni pregled
• Keywords (english): Horse-Chestnut Leaf Miner; Horse-Chestnut; intensity of attack; visually examination
• Language: croatian
• URN:NBN: urn:nbn:hr:204:033970
• Study programme: Title: Phytomedicine; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka fitomedicine (magistar/ magistra inženjer/inženjerka fitomedicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2018-03-16 07:50:15