TY - JOUR A1 - Takov, Danail A1 - Pilarska, Daniela A1 - Linde, Andreas A1 - Barta, Marek T1 - Infectious and parasitic diseases of phytophagous insect pests in the context of extreme environmental conditions JF - Central European Forestry Journal N2 - The density of phytophagous insect pest populations is related (directly and indirectly) to several groups of factors that can be broadly divided into: abiotic, biotic and anthropogenic. Each extreme in the abiotic environment at a macro-level leads to a series of consecutive extremes in the biotic environment, which eventually results in micro-level responses in the individual organisms. The manifestation of factors acts in aggregate or in a sequence, creating a chain of processes around us. Insects very efficiently use the abundance of nutritional resources, resulting in a tremendous increase in their population density, and triggering control mechanisms through the emergence of parasitic and pathogenic infections (viruses, bacteria, fungi, microsporidia, protozoa and nematodes). The development of entomopathogenic infections in host populations is directly dependent on the characteristics of both the antagonist and the insect. It is associated with the lifestyle and life cycle of the insect, with features encoded in the mechanism of pathogen action, and limited by the pathogen’s virulence and pathogenicity. KW - Entomopathogenic infections KW - Environmental conditions KW - Extreme KW - Insect pests KW - Epizootic Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-2541 SN - 2454-0358 VL - 67 IS - 2 SP - 72 EP - 84 PB - Sciendo ER - TY - JOUR A1 - Kereselidze, Manana A1 - Pilarska, Daniela A1 - Linde, Andreas A1 - Sanscrainte, Neil D. A1 - Hajek, Ann E. T1 - Nosema maddoxi infecting the brown marmorated Stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), in the Republic of Georgia JF - Biocontrol Science and Technology N2 - Halyomorpha halys is an invasive, polyphagous stink bug from Asia, first reported attacking hazelnut orchards in the Republic of Georgia in 2015. A microsporidian pathogen discovered in Georgian H. halys has been identified as Nosema maddoxi by sequencing the ribosomal small subunit gene. Nosema maddoxi is native to North America and has also been found in China and South Korea; in North America it infects native stink bugs and H. halys. Investigations were carried out during different seasons in three regions of West Georgia in 2018–2019. The highest prevalence of N. maddoxi was detected among overwintered adults collected in May in the Guria region. KW - Microsporidia; entomopathogen; invasive species; natural enemy Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-4942 SN - 0958-3157 SN - 1360-0478 VL - 30 IS - 10 PB - Taylor & Francis ER - TY - CHAP A1 - Pilarska, Daniela A1 - Schafellner, Christa A1 - Georgiev, Georgi A1 - Georgieva, Margarita A1 - Mirchev, Plamen A1 - Zelinka, Peter A1 - Grollnigg, Katrin A1 - Goertz, Dörte A1 - Linde, Andreas A1 - Hoch, Gernot T1 - Entomophaga maimaiga, an introduced pathogen of the gypsy moth, Lymantria dispar, in Europe: A joint study in Bulgaria and Austria T2 - Mitteilungen der DGaaE N2 - Der aus Ostasien stammende entomopathogene Pilz Entomophaga maimaiga (Entomophthoromycota: Entomophthorales) hat in Nordamerika sein Potential als wirksamer Antagonist des Schwammspinners Lymantria dispar (Lepidoptera, Erebidae) gezeigt. In den Jahren 1999 und 2000 wurde der Pilz als Maßnahme der biologischen Bekämpfung von L. dispar in Bulgarien freigesetzt. Seither hat sich E. maimaiga rasch auf der Balkanhalbinsel und in Südosteuropa ausgebreitet. Untersuchungen an zahlreichen blattfressenden Insekten bestätigten die hohe Wirtsspezifität. In einem Kooperationsprojekt wurde der Status von E. maimaiga in Bulgarien und Österreich untersucht. Achtzehn Jahre nach der Einbürgerung ist der Pilz in Bulgarien etabliert, und hohe Mortalitäten bei L. dispar werden seither regelmäßig dokumentiert. In Österreich wurde E. maimaiga in Screenings in den Jahren 2014 und 2018 in insgesamt 15 Eichenwäldern mit bekannten L. dispar-Vorkommen nicht nachgewiesen. Im Sommer 2019 wurden in zwei Eichenwäldern in Niederösterreich tote L. dispar Larven gefunden, die mit E. maimaiga infiziert waren. KW - Entomophaga maimaiga; entomopathogenic fungi; Lymantria dispar; biological control Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-4963 UR - https://www.dgaae.de/files/user-upload/publikationen/mitteilungen_der_dgaae/Mitteilungen%2022/1212.pdf SN - 0344-9084 VL - 22 SP - 285 EP - 288 ER - TY - JOUR A1 - Kereselidze, Manana A1 - Pilarska, Daniela A1 - Guntadze, Nika A1 - Linde, Andreas T1 - Halyomorpha halys Stål, (Hemiptera:Pentatomidae) feeding effects on some agriculturalfruits in Georgia JF - Turkish Journal of Zoology N2 - Feeding effects of the invasive, polyphagous brown marmorated stink bug (BMSB), Halyomorpha halys (Hemiptera:Pentatomidae), on some agricultural fruits (hazelnut, blueberry, mandarin, lemon) were investigated in Guria and Samegrelo regions of Georgia in 2019 and 2020. The damage to hazelnut kernels was evaluated when H. halys adults were allowed to feed on kernels in different stages of development. Furthermore, BMSB adults were allowed to feed on almost ripened fruits of blueberry, on small mandarin fruits which were not yet well developed, and on ripened fruits of mandarin. The evaluation of damage on lemon was recorded after allowing adult BMSB on small, not yet developed fruits and on almost developed fruits. It was shown that hazelnuts are susceptible to damage caused by feeding of BMSB throughout the entire period of kernel development (100% of kernels were damaged and did not develop at all). Furthermore, BMSB damages blueberry severely (100% damage) when the fruits are almost ripened. Damage to mandarin fruits in early development stages was over 90%, and 100% of ripened mandarin fruits dropped to the ground. We did not find any damage when BMSB was allowed to feed on Lemon throughout the development of the fruits. KW - Halyomorpha halys; hazelnut; blueberry; mandarin; lemon; damage Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-7441 SN - 1300-0179 VL - 46 IS - 3 SP - 298 EP - 303 PB - Tübitak ER -