Search

During the annual monitoring surveys for the pinewood nematodes, Bursaphelenchus xylophilus, conducted in the Tuscany region (Central Italy) from the year 2015 to 2019, a total of 1,025 wood samples were collected from symptomatic plants in coniferous forests. Among the eight Bursaphelenchus species found, Bursaphelenchus abietinus and B. andrassyi were identified through morphological and molecular analysis and recorded for the first time in Italy. Additionally, new associations between Bursaphelenchus species and the host plants or insect vectors have been reported. The generalized linear models performed to investigate the possible relation between the level of coniferous plant decay and the occurrence of Bursaphelenchus nematodes highlighted that the probability of the Bursaphelenchus presence in the samples increased with the degeneration of the phytosanitary state of the tree, the presence of blue stain fungi and different types of insects.

V prispevku prikazujemo pet vrst podlubnikov na navadni jelki (Abies alba): ostrozobega jelovega lubadarja (Pityokteines spinidens), zrnatega jelovega lubadarja (Cryphalus piceae), krivozobega jelovega lubadarja (Pityokteines curvidens), jelovega vejnega lubadarja (Pityophthorus pityographus), Vorontzowovega jelovega lubadarja (Pityokteines vorontzowi) ter velikega jelovega rilčkarja (Pissodes piceae). Na kratko je prikazana njihova morfologija, bionomija, opis poškodb, morebitne zamenjave, gostitelji, ogroženost sestojev, vzroki za gradacije ter dosedanje gradacije jelovih podlubnikov pri nas. Za najpomembnejše vrste je opisana tudi kontrola gostote populacij in zatiranje, našteti so njihovi najpomembnejši naravni sovražniki. In this article we present five species of bark beetles on Silver fir (Abies alba): Pityokteines spinidens, Cryphalus piceae, Pityokteines curvidens, Pityophthorus pityographus, Pityokteines vorontzowi and Pissodes piceae. A short description of their morphology, bionomy, description of damages, possible misidentifications, hosts, their threat to forests, causes of their outbreaks and previous gradations in Slovenia are given. For the most important species control of population density and suppression are also described and their most important natural enemies are listed.