Iskanje po repozitoriju

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Povzetek: Popis povzročiteljev poškodb drevja na ploskvah intenzivnega monitoringa gozdnih ekosistemov (IMGE) se je začel leta 2009 in od takrat poteka vsako leto. Popis povzročiteljev poškodb drevja na ploskvah IMGE poteka po mednarodno sprejeti metodologiji ICP Forests. Pri vseh najpogostejših drevesnih vrstah (bukev, smreka, črni bor, rdeči bor, beli gaber) zaznavamo trend večje povprečne osutosti krošnje. Najpomembnejši povzročitelj poškodb drevja na ploskvah IMGE so glive (bolezni), na drugem mestu povprečne poškodovanosti krošnje v letu 2022 so bile žuželke, na tretjem pa je bila kategorija povzročiteljev "drugo", kjer je bila izpostavljena konkurenca kot povzročiteljica osutosti in poškodb krošnje. Ker popis poteka vsako leto na istih lokacijah, je mogoče izračunati trende razvoja poškodovanosti dreves v proučevanih gozdnih ekosistemih ter raziskovati vzroke in učinke stresnih dejavnikov, kar je tudi osnovni namen ploskev IMGE.
Ključne besede: spremljanje poškodovanosti gozdov, bolezeni, škodljivec, poškodbe, zdravje gozdov, trendi, monitoring
Objavljeno v DiRROS: 06.12.2024; Ogledov: 1145; Prenosov: 712
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Povzetek: Insects in 9 research areas in pedunculate oak and sessile oak forests in Slovenia have been studied. We identified 35 insect species as well as two genera from 13 families. The defoliation of oak leaves in studied forests was between 10 and 90 %. More than 80 % of the defoliation was caused by mottled umber and winter moth (Erannis defoliaria Cl., Operophthera brumata L.). Leaf-roll moths are an important group of pests of oak leaves and acorns. The most numerous is the green leaf-roll moth, Tortrix viridana L., followed by Archips crataegana Hb., Laspeyresia splendana Hb. and Laspeyresia amplana Hb. The ratio of appearance of oak sawflies (Apethymus abdominalis Lep. and Apethymus braccatus Gmel.) was 9 : 1. During the past 10 years, oak miner (Tischeria complanella Hb.) has attacked young oak trees heavily. Acorn destroyers (Balaninus glandium Mrsh. and Balaninus nucum L.) were important acorn pests. During the gradation of defoliators in the Prekmurje region of Slovenia there was an increased population density of their predators, such asground beetles and burying beetles (Calosoma sycophanta L., Calosoma inquisitor L., Carabus spp., Xylodrepa quadripunctata L. We can confirm that the health of oak forests in Slovenia is better than in Croatia and southeastern Europe.
Ključne besede: dob, Quercus robur, graden, Quercus petraea, gozdarska entomologija, Insecta, žuželka, škodljivec, entomofauna, Slovenija, pedunculate oak, Quercus robur, sessile oak, Quercus petraea, forest entomology, Insecta, entomofauna, Slovenija
Objavljeno v DiRROS: 12.07.2017; Ogledov: 6134; Prenosov: 2561
Celotno besedilo (741,02 KB)