Iskanje po repozitoriju

A+ | A- | | SLO | ENG

Povzetek: The genus Agrilus is one of the most diverse insect genera worldwide. The larval feeding activity causes extensive damage in both forests and orchards. In addition, more than 30 species have been introduced outside their native range so far, including the emerald ash borer Agrilus planipennis Fairmaire. Thus, the availability of efficient trapping protocols for early detection of Agrilus species at entry points is of utmost importance. In this study we tested whether trapping protocols developed for surveillance of A. planipennis in North America were also effective for other Agrilus species. In particular, through a multi-country assessment we compared the efficacy of detecting Agrilus species on: (i) green glue-coated prism traps vs. green Fluon-coated multi-funnel traps when baited with the green leaf volatile (Z)-3-hexenol or left unbaited; and (ii) green multi-panel traps vs. green multi-panel traps baited with dead adult Agrilus beetles (decoys). A total of 23,481 individuals from 45 Agrilus species were caught. Trap design significantly affected both species richness and abundance of Agrilus species in several of the countries where the trapping experiments were carried out, and green prism traps outperformed green multi-funnel traps in most cases. On the contrary, the addition of a (Z)-3-hexenol lure or dead adult beetle decoys on to traps did not improve trap catches. Our study highlights that reliable trap models to survey Agrilus species are already available, but also that there is the clear need to further investigate chemical ecology of Agrilus species to develop semiochemical lures that can improve detection efficacy.
Ključne besede: biosecurity, early detection, forest pests, lures, traps, visual stimuli, Agrilus, beetles
Objavljeno v DiRROS: 19.01.2024; Ogledov: 176; Prenosov: 109
Celotno besedilo (3,11 MB)
Gradivo ima več datotek! Več...

Povzetek: The northern spruce bark beetle, Ips duplicatus (Sahlberg), has invaded Central Europe in the past century and continues to spread southwards and westwards. It has caused damage in some parts of Europe in recent decades and poses a serious threat to spruce forests across the continent. From 2018 to 2021, we conducted intensive monitoring to determine the status of I. duplicatus in Slovenia. We used different types of traps and pheromone lures that attract I. duplicatus beetles and took bark samples from bark beetle-infested trees. Of the 26 traps used during the four years of monitoring, I. duplicatus was found in 16 traps in the central part of Slovenia in 2020. Adult beetles were caught in traps containing both I. typographus and I. duplicatus lures. The identity of this species was confirmed using morphological keys and molecular methods. One to five I. duplicatus beetles were found per trap, totaling 25 specimens. However, we did not confirm any I. duplicatus in samples taken from trees in 2021. We conclude that I. duplicatus is present in Slovenia, but our results suggest that the species is only present locally and that the population is small.
Ključne besede: biological invasions, forest pests, temperate forests, conifers, damage, forest pest monitoring, confirmation
Objavljeno v DiRROS: 05.09.2023; Ogledov: 342; Prenosov: 159
Celotno besedilo (3,04 MB)
Gradivo ima več datotek! Več...

Ključne besede: varstvo gozdov, usposabljanja
Objavljeno v DiRROS: 20.04.2023; Ogledov: 403; Prenosov: 71
Celotno besedilo (353,97 KB)

Ključne besede: varstvo gozdov, morfološke analize, Xylosandrus crassisculus, azijski ambrozijski podlubnik
Objavljeno v DiRROS: 16.11.2022; Ogledov: 476; Prenosov: 0

Ključne besede: varstvo gozdov, morfološke analize, Xylosandrus crassisculus, azijski ambrozijski podlubnik
Objavljeno v DiRROS: 16.11.2022; Ogledov: 421; Prenosov: 0