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3. Second level analysis on extreme events : windthrow Jelovica and Črnivec, fire Šumka, Slovenia : [MANFRED - Management strategies to adapt Alpine Space forests to climate change risk]Mitja Skudnik, Laura Žižek, Vida Papler-Lampe, Marija Kolšek, Boštjan Košiček, Tajda Lekše, Andrej Breznikar, 2012 DiRROS - Objavljeno: 12.07.2017; Ogledov: 2296; Prenosov: 597
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6. Namnožitev populacij osmerozobega smrekovega lubadarja in šesterozobega smrekovega lubadarja v Sloveniji v 2019Nikica Ogris, Marija Kolšek, 2019 Ključne besede: Ips typographus, Pityogenes chalcographus, namnožitev, navadna smreka, Picea abies, osmerozobi smrekov lubadar, šesterozobi smrekov lubadar, lokacije, populacije, RITY-2, CHAPY-1, gostota, model
DiRROS - Objavljeno: 26.07.2019; Ogledov: 1599; Prenosov: 916
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7. Kratkoročna napoved ulova osmerozobega smrekovega lubadarja (Ips typographus) v kontrolne pasti tipa Theysohn za leto 2019 za SlovenijoMaarten De Groot, Marija Kolšek, 2019 Ključne besede: Ips typographus, navadna smreka, Picea abies, osmerozobi smrekov lubadar, šesterozobi smrekov lubadar, prenamnožitev, pasti, gostota populacije
DiRROS - Objavljeno: 10.10.2019; Ogledov: 1525; Prenosov: 846
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8. Estimating the most effective and economical pheromone for monitoring the European spruce bark beetleMaarten De Groot, Marija Kolšek, Andreja Kavčič, Nina Šramel, 2021 Povzetek: In recent decades, there have been an increasing number of outbreaks of Ips typographus in Europe. A large amount of sanitary felling has taken place, with significant economic and ecological consequences. In order to anticipate such large%scale outbreaks, an effective monitoring system should be set up. One important aspect of monitoring is deciding which pheromone to use. Therefore, we decided to test five different commercially available pheromone lures under different disturbance conditions: Pheroprax%, IT Ecolure Extra%, Ipstyp%, Ipsowit% and Typosan%. We investigated the ability of the pheromones to distinguish between disturbed and undisturbed locations, their cost%efficiency ratio, and side effects such as bycatch abundance and composition. We set 50 traps in two areas with sites that were disturbed and undisturbed by windstorms. We collected the catch from traps every 1%2 weeks from the end of March until the end of September in 2019. We found that IT Ecolure Extra%, Ipsowit% and % Pheroprax% caught the most I. typographus and best showed changes in the trap catch of I. typographus throughout the whole season. There was a low amount of bycatch (<6% of the total catch) and a low number of predators (a few specimens), but some groups seem to prefer certain pheromones. The cost of the pheromones increased with their effectiveness. However, pheromone costs are low relative to the personnel costs involved in setting traps and collecting the catch. Based on all of the gathered data, we created an index which helps to assess the cost%efficiency of the five chosen commercially available pheromones. We also present guidelines on how to make such an index to assist other researchers in choosing the right pheromone for monitoring populations of I. typographus or other bark beetle species.
Ključne besede: bark beetles, cost-efficiency, Ips typographus, monitoring pheromones, Picea abies
DiRROS - Objavljeno: 21.01.2021; Ogledov: 493; Prenosov: 175
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