1. Napoved ulova smrekovih lubadarjev (Ips typographus in Pityogenes chalcographus) v kontrolne feromonske pasti tipa Theysohn za leto 2016Maarten De Groot, Marija Kolšek, Andreja Kavčič, 2016, strokovni članek Ključne besede: prenamnožitev, navadna smreka, napovedi, splošni linearni modeli, osmerozobi smrekov lubadar, šesterozobi smrekov lubadar, Ips typographus, Pityogenes chalcographus
Objavljeno v DiRROS: 07.04.2025; Ogledov: 150; Prenosov: 86
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2. Palomena prasina (Hemiptera: Pentatomidae) vibratory signals and their tuning with plant substratesJernej Polajnar, Andreja Kavčič, Alenka Žunič Kosi, Andrej Čokl, 2013, izvirni znanstveni članek Povzetek: Palomena prasina is interesting for the study of vibrational communication within the Pentatomid subfamily Pentatominae, because its host range is limited to woody plants, unlike the better known Nezara viridula, whose vibrational communication is commonly used as a model for the whole family. The vibrational repertoire of P. prasina was described several decades ago and is redescribed in this paper using modern methods for non-contact vibration recording. Additionally, we hypothesized that this species has retained the capacity for signal frequency variation necessary for tuning to resonance properties of various host plants of Pentatominae, but if the signals are emited in the absence of mechanical feedback, they are tuned more specifically to their native acoustic environment – woody plants. By recording live bugs signalling on different substrates and comparing spectral properties of their signals among substrates, we found that there is a match between the signals emitted on a woody branch and those emitted on a non-resonant surface, while spectral properties of signals emitted on herbaceous plants differ. Our findings provide evidence in support of the signal tuning hypothesis and shed further light on the crucial role of substrate in vibrational communication of insects.
Ključne besede: vibrational communication, signal propagation, frequency characteristics
Objavljeno v DiRROS: 12.03.2025; Ogledov: 205; Prenosov: 123
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3. The influence of storage conditions and DNA extraction protocol on the results of molecular analysis of the European spruce bark beetle (Ips typographus L.)Zina Devetak, Andreja Kavčič, Maarten De Groot, Barbara Piškur, 2023, izvirni znanstveni članek Povzetek: One of the key steps of the molecular identification of bark beetles is obtaining a sufficient quantity of high-quality DNA extract. In this study, we investigated the influence of different storage procedures for Ips typographus (L.) specimens and various DNA extraction protocols on the quantity and quality of DNA intended for use in molecular diagnostics. Adult beetles were frozen at -20 °C, either dry or in ethanol. We tested four different protocols for DNA extraction. We compared the quantity of extracted DNA and assessed its quality with PCR and Sanger sequencing. Different storage protocols had no significant effect on the quantity of DNA extracted. However, freezing specimens in ethanol provided higher-quality DNA for molecular applications. Only two of the extraction protocols produced sequenceable amplicons, and the difference in the amount of extracted DNA between them was not significant. We propose the optimal combination of storing specimens in ethanol at -20°C and using the Nucleospin Insect DNA extraction kit from Macherey Nagel, enabling a timeefficient identification process.
Ključne besede: early detection, specimen storage, total DNA extraction, PCR, polymerase chain reaction, Sanger sequencing, molecular diagnostics
Objavljeno v DiRROS: 02.02.2024; Ogledov: 1611; Prenosov: 553
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4. Bolezni, škodljivci in sušni stres pri navadni bukvi v različnih scenarijih podnebnih sprememb (V4-2026) : Aktivnost 2.1: Vzroki hiranja navadne bukve v SlovenijiNikica Ogris, Andreja Kavčič, Janja Zajc Žunič, Ana Brglez, Maarten De Groot, Barbara Piškur, 2023, elaborat, predštudija, študija Ključne besede: kompleksna bolezen, škodljiv dejavnik, hiranje, fakultativen patogen, endofit, sušni stres, stresni dejavniki
Objavljeno v DiRROS: 03.11.2023; Ogledov: 968; Prenosov: 296
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5. First record of the northern spruce bark beetle, Ips duplicatus (Sahlberg, 1836), in SloveniaAndreja Kavčič, Zina Devetak, Barbara Piškur, Eva Groznik, Maarten De Groot, 2023, izvirni znanstveni članek 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: 1017; Prenosov: 560
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6. Sušenje jelovih krošenj zaradi gliv povezanih s Pityokteines vorontzowiAna Brglez, Barbara Piškur, Andreja Kavčič, 2023, drugi znanstveni članki Ključne besede: gozdovi, varstvo gozdov, bela jelka, Abies alba, Vorontzowov jelov lubadar, Pityokteines vorontzowi, Geosmithia sp.
Objavljeno v DiRROS: 24.03.2023; Ogledov: 1130; Prenosov: 519
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7. Poročilo o preskusu št.: LVG 2022-220 : vzorec št. 2022/00712Andreja Kavčič, 2022, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, Pinus nigra, žuželke, ličinke, Monochamus sp., črni bor
Objavljeno v DiRROS: 16.12.2022; Ogledov: 931; Prenosov: 324
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