The long-horned beetle Tetropium gabrieli develops by exploiting the European larch (Larix decidua). It is a secondary parasite native to the Alpine system, specifically a xylophagous insect that attacks already ailing trees. However, the presence of non-indigenous larch species in Europe together with the extension of larch plantations outside their natural habitat favored its diffusion. Additionally, it can attack plants heavily affected by stress water. Symptoms, not very evident in the early stages, reveal themselves when the attack is already at a stage advanced by observing a change in color of the foliage and consequent needle loss. The purpose of this study is to analyze the development trend of Tetropium gabrieli over the course of the season and in particular of fertility. The study was conducted on samples collected during the 2023 summer season, using traps placed in a larch forest covering an area of approximately 200 hectares in Tanas, located in Val Venosta, province of Bolzano, in cooperation with the Forest Service.
Il coleottero cerambicide Tetropium gabrieli si sviluppa sfruttando il larice europeo (Larix decidua). É un parassita secondario originario del sistema alpino, ovvero uno xilofago che attacca alberi già deperenti. Tuttavia la presenza di specie di larice non indigene in Europa congiuntamente all’estensione delle piantagioni di larice al di fuori del loro habitat naturale ne hanno favorito la diffusione. Inoltre è in grado di attaccare piante fortemente colpite da stress idrico. I sintomi, poco evidenti nelle prime fasi, si rivelano quando l’attacco è già in uno stadio avanzato osservando un cambiamento di colore della chioma e conseguente perdita di aghi. Lo scopo di questo elaborato è l’analisi dell’andamento dello sviluppo di Tetropium gabrieli nel corso della stagione e in particolare della fecondità. Lo studio è stato condotto su campioni raccolti durante la stagione estiva 2023, utilizzando trappole collocate in un lariceto che copre un’area di circa 200 ettari a Tanas, situato nella Val Venosta, provincia di Bolzano, in cooperazione con il Servizio Forestale.
Sviluppo e fecondità del cerambice del larice Tetropium gabrieli in Val Venosta
DANZO, DANIELE
2023/2024
Abstract
The long-horned beetle Tetropium gabrieli develops by exploiting the European larch (Larix decidua). It is a secondary parasite native to the Alpine system, specifically a xylophagous insect that attacks already ailing trees. However, the presence of non-indigenous larch species in Europe together with the extension of larch plantations outside their natural habitat favored its diffusion. Additionally, it can attack plants heavily affected by stress water. Symptoms, not very evident in the early stages, reveal themselves when the attack is already at a stage advanced by observing a change in color of the foliage and consequent needle loss. The purpose of this study is to analyze the development trend of Tetropium gabrieli over the course of the season and in particular of fertility. The study was conducted on samples collected during the 2023 summer season, using traps placed in a larch forest covering an area of approximately 200 hectares in Tanas, located in Val Venosta, province of Bolzano, in cooperation with the Forest Service.File | Dimensione | Formato | |
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Danzo Daniele, tesi su Tetropium gabrieli .pdf
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https://hdl.handle.net/20.500.12608/73025