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Journal articles on the topic 'Forest insects’ outbreaks'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Kamata, N. "Outbreaks of forest defoliating insects in Japan, 1950–2000." Bulletin of Entomological Research 92, no. 2 (2002): 109–17. http://dx.doi.org/10.1079/ber2002159.

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AbstractIn Japan, several forest-defoliating insects reach outbreak levels and cause serious defoliation. Stand mortality sometimes occurs after severe defoliation. However, in general, tree mortality caused by insect defoliation is low because of the prevailing moist climate in Japan. Evergreen conifers are more susceptible to tree mortality as a result of insect defoliation whereas deciduous broad-leaved trees are seldom killed. Insect defoliation occurs more frequently in man-made environments such as among shade trees, orchards, and plantations than in natural habitats. Outbreaks of some d

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2

Grüning, Maren, Lukas Beule, Stephanie Meyer, Petr Karlovsky, and Anne I.-M.-Arnold. "The Abundance of Fungi, Bacteria and Denitrification Genes during Insect Outbreaks in Scots Pine Forests." Forests 9, no. 8 (2018): 497. http://dx.doi.org/10.3390/f9080497.

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Outbreaks of defoliating insects may affect microbial populations in forests and thereby mass balances and ecosystem functioning. Here, we investigated the microbial dynamics in Scots pine (Pinus sylvestris L.) forests during outbreaks of the nun moth (Lymantria monacha L.) and the pine-tree lappet (Dendrolimus pini L.). We used real-time PCR (polymerase chain reaction) to quantify genes that characterize bacterial and fungal abundance and the denitrification processes (nirK, nirS, nosZ clades I and II) in different forest compartments and we analyzed the C and N content of pine needles, insec

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3

Soukhovolsky, Vladislav, Polina Krasnoperova, Anton Kovalev, et al. "Differentiation of Forest Stands by Susceptibility to Folivores: A Retrospective Analysis of Time Series of Annual Tree Rings with Application of the Fluctuation-Dissipation Theorem." Forests 14, no. 7 (2023): 1385. http://dx.doi.org/10.3390/f14071385.

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This study analyzed the relationship between characteristics of annual tree ring time series and the intensity of attacks on forest stands by forest insects. Using tenets of the fluctuation–dissipation theorem (which is widely used in physics), time series parameters are proposed that can help to assess the susceptibility of a forest stand to insect pests. The proposed approach was applied to evaluate differences in parameters of tree ring widths among outbreaks of the pine looper, Siberian silk moth, and spongy moth. A comparison of trees characteristics between outbreak locations and undamag

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4

Hadley, Keith S., and Thomas T. Veblen. "Stand response to western spruce budworm and Douglas-fir bark beetle outbreaks, Colorado Front Range." Canadian Journal of Forest Research 23, no. 3 (1993): 479–91. http://dx.doi.org/10.1139/x93-066.

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The montane forests (i.e., below ca. 2900 m) of the Colorado Front Range have experienced repeated outbreaks of western spruce budworm (Choristoneuraoccidentalis Free.) and Douglas-fir bark beetle (Dendroctonuspseudotsugae Hopk.), both of which locally attack Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco). In this study we examine the effects of historically documented outbreaks of these insects on succession, stand structure, and radial growth of host and nonhost species in Rocky Mountain National Park. The most recent budworm (1974–1985) and bark beetle (1984–present) outbreaks resulted i

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5

Kashain, Daniel. "Carbon Storage Responses of Subalpine Forests to Moutain Pine Beetle Outbreaks Under Current and Altered Climate Regimes in Western North America." UW National Parks Service Research Station Annual Reports 31 (January 1, 2008): 93–96. http://dx.doi.org/10.13001/uwnpsrc.2008.3713.

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Understanding how climate, disturbances, and carbon storage interact in subalpine forests is critical for assessing the role of this ecosystem in the global carbon budget under altered climate scenarios. Most research to date in western North American forests has focused on wildfire effects on carbon storage and net ecosystem productivity (NEP). The current extensive insect outbreak in this region, however, suggests that insects such as the mountain pine beetle (MPB) are an important driver of carbon dynamics and may determine whether western landscapes are carbon sinks or sources. The overall

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Kashian, Daniel. "Carbon Storage Responses of Subalpine Forests to Mountain Pine Beetle Outbreaks Under Current and Altered Climate Regimes in Western North America." UW National Parks Service Research Station Annual Reports 32 (January 1, 2009): 101–5. http://dx.doi.org/10.13001/uwnpsrc.2009.3763.

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Understanding how climate, disturbances, and carbon storage interact in subalpine forests is critical for assessing the role of this ecosystem in the global carbon budget under altered climate scenarios. Most research to date in western North American forests has focused on wildfire effects on carbon storage and net ecosystem productivity (NEP). The current extensive insect outbreak in this region, however, suggests that insects such as the mountain pine beetle (MPB) are an important driver of carbon dynamics and may determine whether western landscapes are carbon sinks or sources. The overall

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7

Soukhovolsky, V. G., Yu D. Ivanova, and A. V. Kovalev. "The Development of Outbreaks of Forest Insects on Different Spatial Scale." Лесоведение, no. 2 (March 1, 2023): 174–89. http://dx.doi.org/10.31857/s0024114823020092.

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The work is dedicated to the discussion of the possibilities of describing the dynamics of the forest insect outbreaks development on different spatial scales. The properties of outbreaks were considered on a microspatial scale, where the distribution patterns of individuals across different food sources within the boundaries of a local territory or a stand were analysed, and on a macrospatial scale, where the focus of the analysis were the indicators of the photosynthetic apparatus (leaves or needles) removal over the entire territory of the locus, including primary, secondary and migratory l

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8

Simler-Williamson, Allison B., David M. Rizzo, and Richard C. Cobb. "Interacting Effects of Global Change on Forest Pest and Pathogen Dynamics." Annual Review of Ecology, Evolution, and Systematics 50, no. 1 (2019): 381–403. http://dx.doi.org/10.1146/annurev-ecolsys-110218-024934.

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Pathogens and insect pests are important drivers of tree mortality and forest dynamics, but global change has rapidly altered or intensified their impacts. Predictive understanding of changing disease and outbreak occurrence has been limited by two factors: ( a) tree mortality and morbidity are emergent phenomena determined by interactions between plant hosts, biotic agents (insects or pathogens), and the environment; and ( b) disparate global change drivers co-occur, obscuring net impacts on each of these components. To expand our understanding of changing forest diseases, declines, and outbr

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9

Mistretta, P. A. "Southern Forest Resource Assessment highlights: Managing for Forest Health." Journal of Forestry 100, no. 7 (2002): 24–27. http://dx.doi.org/10.1093/jof/100.7.24.

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Abstract Both native and exotic insects and diseases affect southern forest health and vitality and therefore have ecological and economic effects. In addition, there are abiotic factors, such as climate change and air pollution, that may interact with and sometimes exacerbate the dynamics of insect and disease outbreaks. Managing for forest health in this changing environment remains a critical challenge for forest managers in the South. The Southern Forest Resource Assessment (SFRA) addressed questions regarding the health of forest ecosystems; this summary of the findings focuses on the imp

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10

Yu, H., J. K. Holopainen, M. Kivimäenpää, A. Virtanen, and J. D. Blande. "Potential of Climate Change and Herbivory to Affect the Release and Atmospheric Reactions of BVOCs from Boreal and Subarctic Forests." Molecules 26, no. 8 (2021): 2283. http://dx.doi.org/10.3390/molecules26082283.

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Compared to most other forest ecosystems, circumpolar boreal and subarctic forests have few tree species, and are prone to mass outbreaks of herbivorous insects. A short growing season with long days allows rapid plant growth, which will be stimulated by predicted warming of polar areas. Emissions of biogenic volatile organic compounds (BVOC) from soil and vegetation could be substantial on sunny and warm days and biotic stress may accelerate emission rates. In the atmosphere, BVOCs are involved in various gas-phase chemical reactions within and above forest canopies. Importantly, the oxidatio

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Soukhovolsky, Vladislav, Anton Kovalev, Andrey A. Goroshko, Yulia Ivanova, and Olga Tarasova. "Monitoring and Prediction of Siberian Silk Moth Dendrolimus sibsiricus Tschetv. (Lepidoptera: Lasiocampidae) Outbreaks Using Remote Sensing Techniques." Insects 14, no. 12 (2023): 955. http://dx.doi.org/10.3390/insects14120955.

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The feasibility of risk assessment of a Siberian silk moth (Dendrolimus sibiricus Tschetv.) outbreak was analyzed by means of landscape and weather characteristics and tree condition parameters. Difficulties in detecting forest pest outbreaks (especially in Siberian conditions) are associated with the inability to conduct regular ground surveillance in taiga territories, which generally occupy more than 2 million km2. Our analysis of characteristics of Siberian silk moth outbreak zones under mountainous taiga conditions showed that it is possible to distinguish an altitudinal belt between 400

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Čėsna, Vytautas, Artūras Gedminas, Jūratė Lynikienė, and Diana Marčiulynienė. "Insect Diversity in Pinus sylvestris Forest Stands Damaged by Lymantria monacha." Insects 15, no. 3 (2024): 200. http://dx.doi.org/10.3390/insects15030200.

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Outbreaks of Lymantria monacha are of great concern, as their occurrence is predicted to become more intense and frequent due to a warming climate. A frequent treatment to control mass outbreaks of the pest is with the bioinsecticide Foray 76B. However, knowledge of how this treatment affects non-target insect species is limited. We surveyed the assemblages of non-target epigeal and arboreal insects in Pinus sylvestris forests in the year following bioinsecticide application. A collection of insects using sweep nets and pitfall traps was carried out in L. monacha-infested pine stands, (i) trea

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13

MacLean, David A. "Impacts of insect outbreaks on tree mortality, productivity, and stand development." Canadian Entomologist 148, S1 (2015): S138—S159. http://dx.doi.org/10.4039/tce.2015.24.

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AbstractThe impacts of insect outbreaks on tree mortality, productivity, and stand development in Canada are reviewed, emphasising spruce budworm (Choristoneura fumiferana(Clemens), Lepidoptera: Tortricidae) and mountain pine beetle (Dendroctonus ponderosaeHopkins, Coleoptera: Curculionidae). Reduced growth and survival are a function of insect population and defoliation level. It is feasible to make short-term (annual) predictions of insect population and defoliation based upon sampling, but long-term, multi-year predictions are problematic. Given the historical record, it is expected that ou

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14

Gandhi, Kamal J. K., Daniel W. Gilmore, Steven A. Katovich, William J. Mattson, John R. Spence, and Steven J. Seybold. "Physical effects of weather events on the abundance and diversity of insects in North American forests." Environmental Reviews 15, NA (2007): 113–52. http://dx.doi.org/10.1139/a07-003.

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We summarize the effects of major weather events such as ice storms, wind storms, and flooding on the abundance and diversity of terrestrial forest insects and their allies. This synthesis indicates that weather events influence both spatial and temporal patterns of forests and insect communities in North American landscapes. The Atlantic and Pacific oceanic sides of the continent are relatively more susceptible to ice and wind storms, respectively. There have been more studies and reports on the responses of forest insects to wind storms, and on economically important subcortical insects than

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15

James, Patrick M. A., and Dezene P. W. Huber. "TRIA-Net: 10 years of collaborative research on turning risk into action for the mountain pine beetle epidemic." Canadian Journal of Forest Research 49, no. 12 (2019): iii—v. http://dx.doi.org/10.1139/cjfr-2019-0384.

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Forest insects are showing increasing intensity of outbreaks and expanded ranges, and this has become a major challenge for forest managers. An understanding of these systems often depends upon detailed examination of complex interactions involving multiple organisms. In 2013, a team of researchers formed TRIA-Net, an NSERC support Strategic Network, with the explicit goal of exploring such interactions in the mountain pine beetle (MPB; Dendroctonus ponderosae Hopkins, 1902) – pine (Pinus sp.) – blue stain fungi (Ophiostomatales) system. Contributions of this network include novel genetic and

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16

Andreieva, Olena, and Anatoliy Goychuk. "Forest site conditions and the threat for insect outbreaks in the Scots pine stands of Polissya." Folia Forestalia Polonica 62, no. 4 (2020): 270–78. http://dx.doi.org/10.2478/ffp-2020-0026.

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AbstractScots pine (Pinus sylvestris L.) is the most spread forest tree species in Polissya and the most damaged by foliage browsing and stem insects. The aim of this study was to reveal the changes in the distribution of different forest site conditions for 2010–2019 in Scots pine forests of the selected forestry enterprises of Polissya and possible consequences for the spread of foliage browsing insects. Database of Production Association ‘Ukrderzhlisproekt’ (by 2010 and 2019) was analysed for five State Forest Enterprises (FE) that are located in the Central (Zhytomyr Region) and Western (R

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Kovalev, Anton, Olga Tarasova, Vladislav Soukhovolsky, and Yulia Ivanova. "Is It Possible to Predict a Forest Insect Outbreak? Backtesting Using Remote Sensing Data." Forests 15, no. 8 (2024): 1458. http://dx.doi.org/10.3390/f15081458.

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In this study, methods are proposed for analyzing the susceptibility of forest stands to attacks by forest insects on the basis of Earth remote sensing data. As an indicator of the state of forest stands, we proposed to use a parameter of the sensitivity of a vegetation index (normalized difference vegetation index; NDVI) during a vegetative period to changes in the radiative temperature of the territory (land surface temperature; LST) determined from satellite data of the Terra/Aqua system. The indicator was calculated as a spectrum of a response function in an integral equation linking chang

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18

Cole, Hailey M., Robert A. Andrus, Cori Butkiewicz, et al. "Outbreaks of Douglas-Fir Beetle Follow Western Spruce Budworm Defoliation in the Southern Rocky Mountains, USA." Forests 13, no. 3 (2022): 371. http://dx.doi.org/10.3390/f13030371.

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Changes in climate are altering disturbance regimes in forests of western North America, leading to increases in the potential for disturbance events to overlap in time and space. Though interactions between abiotic and biotic disturbance (e.g., the effect of bark beetle outbreak on subsequent wildfire) have been widely studied, interactions between multiple biotic disturbances are poorly understood. Defoliating insects, such as the western spruce budworm (WSB; Choristoneura freemanni), have been widely suggested to predispose trees to secondary colonization by bark beetles, such as the Dougla

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Olga, Kukina, Kardash Eugenia, and Shvydenko Inna. "Expected harmfulness of gnawing phyllophagous insects in urban stands of Kharkiv city." FOLIA FORESTALIA POLONICA, SERIES A – FORESTRY 63, no. 4 (2021): 267–75. https://doi.org/10.2478/ffp-2021-0027.

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Urban stands are becoming increasingly important in improving the environmental health and liveability of cities. However, they weaken as a result of technogenic air pollution and become vulnerable to pests, particularly to non-native forest insects. The aim of this research was to assess potential harmfulness (bionomically determined harmfulness [BDH]), environmentally determined harmfulness (EDH) and generally expected harmfulness (GEH) of the gnawing phyllophagous lepidopterous insects in the green stands of Kharkiv (Ukraine). All supplementary parameters were assessed by analysis of public

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20

Senthilkumar N. and Sumathi R. "Machine Learning Approaches for Pest and Insect Management in Forest Scenario: An Outlook." UTTAR PRADESH JOURNAL OF ZOOLOGY 44, no. 23 (2023): 312–16. http://dx.doi.org/10.56557/upjoz/2023/v44i233793.

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Forests are nature's most efficient complex ecological system and vulnerable resources of valuable products which contribute to the sustainable development of communities. In the current scenario of climate change, forest became susceptible to major issues such as diseases, insects, pests and their unpredictable pest outbreaks. The sustainable management and protection of this natural environment from insect, pest, diseases, human interference and unwanted disturbances is vital and needs new tools to find insight and effective management. Computer vision is good at spotting disorder and effici

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Liu, Xiaoxiao, and Chunrui Zhang. "Stability and Optimal Control of Tree-Insect Model under Forest Fire Disturbance." Mathematics 10, no. 15 (2022): 2563. http://dx.doi.org/10.3390/math10152563.

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In this article, we propose a mathematical model for insect outbreaks coupled with wildfire disturbances and an optimization model for finding suitable wildfire frequencies. We use a refined Holling II function as a model for the nonlinear response of fire frequency against trees and insects. The results show that for the tree–insect–wildfire model, there is a coexistence equilibrium in the system. Sensitivity analysis is performed to determine the effect of wildfire on trees in the optimization model. The results show that forest fires have a significant impact on the equilibrium mechanism of

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Glavendekic, Milka, and M. J. Medarevic. "Insect defoliators and their influence on oak forests in the Djerdap national park, Serbia." Archives of Biological Sciences 62, no. 4 (2010): 1137–41. http://dx.doi.org/10.2298/abs1004137g.

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The study of oak phytophagous insects was performed in the period 1992-2010 in the region of the Djerdap National Park. More than a third (36.67%) of the phytophages in oak forests are frequent and can occasionally cause local outbreaks. The early spring defoliator phytophages so far identified in the oak forests of the Djerdap National Park are outbreak species and are significant agents of forest ecosystem degradation and decline. The most frequent species are Tortrix viridana and Operophtera brumata. It was found that Quercus petraea was more affected by dieback then Q. cerris and Q. fraine

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Meshkova, Valentyna, Serhii Nazarenko, and Maryna Kolienkina. "Diprion pini L. (Hymenoptera, Symphyta, Diprionidae) population dynamics in the Low Dnieper region." Folia Forestalia Polonica 61, no. 1 (2019): 22–29. http://dx.doi.org/10.2478/ffp-2019-0002.

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Abstract Pine sawflies (Hymenoptera, Symphyta, Diprionidae) are the most spread foliage browsing insects of pine forests in Europe, especially monovoltinous European pine sawfly Neodiprion sertifer (Geoffroy, 1785) and common pine sawfly Diprion pini (Linnaeus, 1758), which develops in one or two generations per year depending on weather. The outbreaks of both pine sawflies are the most frequent and intensive in the Steppe zone of Ukraine, especially in the Low Dnieper region, where pine forest (Pinus sylvestris Linnaeus and Pinus pallasiana D. Don) was planted on moving sands in the sixties o

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Jaworski, Tomasz, and Jacek Hilszczański. "The effect of temperature and humidity changes on insects development and their impact on forest ecosystems in the context of expected climate change." Forest Research Papers 74 (4) (December 1, 2013): 345–55. https://doi.org/10.2478/frp-2013-0033.

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Ongoing climate change is mainly evident as increased in average temperature. It is expected to have a significant impact on world’s biomes, with forest ecosystems especially vulnerable to these changes. The effect of climate change on forests is both indirect, through its impact on various tree species of different ecological requirements, and direct, through its impact on all living components of the forest ecosystem. Among the latter, insects are the group of the greatest importance, including species detrimental to forest health. The impact of climate change on forest insects may be

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Гниненко, Ю. И. "Rare forest pests." Лесохозяйственная информация, no. 3 (September 17, 2021): 70–82. http://dx.doi.org/10.24419/lhi.2304-3083.2021.3.06.

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Рассмотрены примеры развития очагов массового размножения вредителей леса, которые на большей части своего ареала являются редкими. Некоторые из них внесены в красные книги России или ее регионов. Причины, приводящие к возникновению очагов таких насекомых, как и закономерности развития вспышек их численности, не известны. Некоторые из рассмотренных видов насекомых формировали очаги на небольших площадях один раз или в течение нескольких десятилетий, а другие фитофаги реализовывали вспышки массового размножения на обширных территориях и наносили существенные повреждения кормовым лесным породам.

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Valentyna, Meshkova, Nazarenko Serhii, and Kolienkina Maryna. "Diprion pini L. (Hymenoptera, Symphyta, Diprionidae) population dynamics in the Low Dnieper region." FOLIA FORESTALIA POLONICA, SERIES A – FORESTRY 61, no. 1 (2019): 22–29. https://doi.org/10.2478/ffp-2019-0002.

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Pine sawflies (Hymenoptera, Symphyta, Diprionidae) are the most spread foliage browsing insects of pine forests in Europe, especially monovoltinous European pine sawfly<em> Neodiprion sertifer</em> (Geoffroy, 1785) and common pine sawfly <em>Diprion pini</em> (Linnaeus, 1758), which develops in one or two generations per year depending on weather. The outbreaks of both pine sawflies are the most frequent and intensive in the Steppe zone of Ukraine, especially in the Low Dnieper region, where pine forest (<em>Pinus sylvestris</em> Linnaeus and <em>Pinus pallasiana</em> D. Don) was planted on mo

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Siliņš, Ingars, Annija Kārkliņa, Olga Miezīte, and Āris Jansons. "Trends in Outbreaks of Defoliating Insects Highlight Growing Threats for Central European Forests and Implications for Eastern Baltic Region." Forests 12, no. 6 (2021): 799. http://dx.doi.org/10.3390/f12060799.

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To identify general patterns in the effect of climate-driven changes in the outbreak frequency of forest defoliating species, we examined 60 years of records (1950–2010) of outbreaks of five defoliating species. Data on Lymantria dispar, Lymantria monacha, Bupalus piniarius, Panolis flammea, and Operophtera brumata from five Central European countries (Slovakia, Czech Republic, Austria, Hungary, and Germany), where the current climate is comparable with the projections of climate for the Eastern Baltic region by the end of the 21st century, were analyzed. Time series approach was applied to es

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Soukhovolsky, V. G., Yu D. Ivanova, and A. V. Kovalev. "Development of Outbreaks of Forest Insects on Different Spatial Scales." Contemporary Problems of Ecology 16, no. 7 (2023): 1017–30. http://dx.doi.org/10.1134/s1995425523070120.

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Kukina, Olga, Eugenia Kardash, and Inna Shvydenko. "Expected harmfulness of gnawing phyllophagous insects in urban stands of Kharkiv city." Folia Forestalia Polonica 63, no. 4 (2021): 267–75. http://dx.doi.org/10.2478/ffp-2021-0027.

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Abstract Urban stands are becoming increasingly important in improving the environmental health and liveability of cities. However, they weaken as a result of technogenic air pollution and become vulnerable to pests, particularly to non-native forest insects. The aim of this research was to assess potential harmfulness (bionomically determined harmfulness [BDH]), environmentally determined harmfulness (EDH) and generally expected harmfulness (GEH) of the gnawing phyllophagous lepidopterous insects in the green stands of Kharkiv (Ukraine). All supplementary parameters were assessed by analysis

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Chávez, Roberto, Ronald Rocco, Álvaro Gutiérrez, Marcelo Dörner, and Sergio Estay. "A Self-Calibrated Non-Parametric Time Series Analysis Approach for Assessing Insect Defoliation of Broad-Leaved Deciduous Nothofagus pumilio Forests." Remote Sensing 11, no. 2 (2019): 204. http://dx.doi.org/10.3390/rs11020204.

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Folivorous insects cause some of the most ecologically and economically important disturbances in forests worldwide. For this reason, several approaches have been developed to exploit the temporal richness of available satellite time series data to detect and quantify insect forest defoliation. Current approaches rely on parametric functions to describe the natural annual phenological cycle of the forest, from which anomalies are calculated and used to assess defoliation. Quantification of the natural variability of the annual phenological baseline is limited in parametric approaches, which is

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Hogg, E. H., James P. Brandt, and B. Kochtubajda. "Growth and dieback of aspen forests in northwestern Alberta, Canada, in relation to climate and insects." Canadian Journal of Forest Research 32, no. 5 (2002): 823–32. http://dx.doi.org/10.1139/x01-152.

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Trembling aspen (Populus tremuloides Michx.) is the most important deciduous tree in the Canadian boreal forest, with >1000 Tg of carbon stored in the aboveground biomass of this species. Since the early 1990s, aspen dieback has been noted over parts of the southern boreal forest and aspen parkland in western Canada. In this study, tree-ring analysis and forest health assessments were conducted in 18 aspen stands near Grande Prairie, Alta., to examine causes of reduced growth and dieback. Defoliation histories were reconstructed based on light-colored ("white") tree rings and records of pas

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Meshkova, V., and O. Borysenko. "GIS-based prediction of the foliage browsing insects' outbreaks in the pine stands of the SE "Kreminske FHE"." Наукові праці Лісівничої академії наук України, no. 15 (November 30, 2017): 112–18. http://dx.doi.org/10.15421/411714.

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 To improve the detection and prevention of foliage browsing insects' outbreaks it is very important to reveal the forest plots, which are the most favorable for these pests. The aim of this research was to predict using GIS technologies the spatial dynamics of foliage browsing insects' outbreaks in the pine stands of the State Enterprise "Kreminske FHE" (Luhansk region). Forest inventory databases of Production Association "Ukrderzhlisproekt" were analyzed for the SE "Kreminske FHE" as of 2001 and 2011. Rating of forest plots preferences for common pine sawfly (Diprion pini

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Huang, Jian-Guo, Jacques Tardif, Bernhard Denneler, Yves Bergeron, and Frank Berninger. "Tree-ring evidence extends the historic northern range limit of severe defoliation by insects in the aspen stands of western Quebec, Canada." Canadian Journal of Forest Research 38, no. 9 (2008): 2535–44. http://dx.doi.org/10.1139/x08-080.

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A dendrochronological reconstruction of insect outbreaks was conducted along a latitudinal gradient from 46°N to 54°N in the boreal forest of western Quebec, Canada. Tree-ring chronologies of the host species, trembling aspen ( Populus tremuloides Michx.), were constructed to identify periods of severe defoliation and comparisons were made with tree-ring chronologies of nonhost species. In addition, the frequency of white and narrow rings was used to further confirm the occurrence of insect outbreaks at these latitudes. Some major outbreaks occurred in relatively close synchrony at the regiona

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Uchmański, Janusz. "Cyclic outbreaks of forest insects: A two-dimensional individual-based model." Theoretical Population Biology 128 (August 2019): 1–18. http://dx.doi.org/10.1016/j.tpb.2019.04.006.

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Nordkvist, Michelle, Stephanie Jonsson, Mats Jonsell, and Maartje Johanna Klapwijk. "Effects of retained dead wood on predation pressure on herbivores in young pine forests." PLOS ONE 17, no. 9 (2022): e0273741. http://dx.doi.org/10.1371/journal.pone.0273741.

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Retention of logging residue as dead wood could be a method to simultaneously increase biodiversity and predation rates of pest insects, in managed forests. Managed forests are generally low in diversity, and dead wood has been demonstrated to increase species diversity. Moreover, managed forests are predicted to suffer from higher frequency of insect outbreaks in the future, particularly in the northern hemisphere. In this study, we explore the effect of dead wood removal and addition in managed pine forest stands in Sweden on arthropod diversity and abundance and predation rates. We performe

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Tarasova, O. V., and P. A. Krasnoperova. "Spatio-Temporal Connectivity of the Long-Term Dynamics of the Forest Phyllophagus Insects’ Abundance." Лесоведение, no. 2 (March 1, 2023): 161–73. http://dx.doi.org/10.31857/s0024114823020109.

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The study was conducted regarding the conjugation of the population dynamics of different forest insects species under different landscape conditions on the territory of the Krasnoturansky pine forest (South of the Krasnoyarsk Territory). The population dynamics conjugation indicates the presence of an ecological mechanism that leads to the coordination of the temporal series of different species’ population dynamics in one habitat or one species in different habitats. This means that using the conjugation indicators of insect dynamics one can indirectly assess the influence of various factors

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Engesser, Roland, Beat Forster, Franz Meier, and Beat Wermelinger. "Forstliche Schadorganismen im Zeichen des Klimawandels | Effects of climate change on forest pests and diseases." Schweizerische Zeitschrift fur Forstwesen 159, no. 10 (2008): 344–51. http://dx.doi.org/10.3188/szf.2008.0344.

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The predicted increase in temperature, dry summers, and extreme meteorological events will affect many harmful species both by directly accelerating their propagation rates as well as by weakening their host plants. There might also be shifts in the interrelations in species communities that can hardly be predicted. Some fungal species, that had previously been inconspicuous, caused notable damages in the drought periods of the last two decades. Higher winter temperatures often increase the survival rates of many fungal and insect species. Because hot and dry summers are likely to become more

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Gagnon Koudji, Essivi, Emma Despland, Anne-Sophie Caron, and I. Tanya Handa. "Soil Springtail Communities Are Resilient to Forest Tent Caterpillar Defoliation in Quebec Mixed Hardwood Forests." Forests 14, no. 7 (2023): 1302. http://dx.doi.org/10.3390/f14071302.

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Outbreaks of defoliator insects are important natural disturbances in boreal forests, but their increasing frequency under warming climate conditions is of concern. Outbreak events can shape ecosystem dynamics with cascading effects through trophic networks. Caterpillar defoliation can alter tree physiology, increase sunlight to the understory, and result in the deposition of large amounts of leaf litter and caterpillar frass to the forest floor. These modifications can thus affect soil organisms through direct (e.g., changes in soil temperature or moisture) or indirect (e.g., changes in detri

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Hyblerová, Silvia, Juraj Medo, and Marek Barta. "Diversity and prevalence of entomopathogenic fungi (Ascomycota, Hypocreales) in epidemic populations of bark beetles (Coleoptera, Scolytinae) in spruce forests of the Tatra National Park in Slovakia." Annals of Forest Research 64, no. 1 (2021): 129–45. http://dx.doi.org/10.15287/afr.2021.2152.

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Bark beetles are serious forest pests in Slovakia. Their outbreaks may have significant ecological and economic impacts on spruce forests. There is a variety of natural enemies that activate themselves during population outbreaks of insects and entomopathogenic fungi belong to important antagonists with a potential to regulate populations of their hosts. In 2014–2016, species richness and prevalence of entomopathogenic fungi were evaluated during the bark beetle outbreaks in spruce forests affected by windstorms in the Tatra National Park in Slovakia. Three Beauveria species, B. bassiana, B. c

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Jepsen, Jane U., Snorre B. Hagen, Stein-Rune Karlsen, and Rolf A. Ims. "Phase-dependent outbreak dynamics of geometrid moth linked to host plant phenology." Proceedings of the Royal Society B: Biological Sciences 276, no. 1676 (2009): 4119–28. http://dx.doi.org/10.1098/rspb.2009.1148.

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Climatically driven Moran effects have often been invoked as the most likely cause of regionally synchronized outbreaks of insect herbivores without identifying the exact mechanism. However, the degree of match between host plant and larval phenology is crucial for the growth and survival of many spring-feeding pest insects, suggesting that a phenological match/mismatch-driven Moran effect may act as a synchronizing agent. We analyse the phase-dependent spatial dynamics of defoliation caused by cyclically outbreaking geometrid moths in northern boreal birch forest in Fennoscandia through the m

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Selikhovkin, A. V., and Yu I. Gninenko. "Mass Reproduction Outbreaks of the Phyllophagous Insects in Forests of the North-West of the European Part of Russia." Лесоведение, no. 2 (March 1, 2023): 102–15. http://dx.doi.org/10.31857/s0024114823020080.

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Data on the species composition and dynamics of outbreaks of needle- and leaf-eating pests that pose a danger to forest stands in the Arkhangelsk, Leningrad and Murmansk regions,as well as in the Republics of Karelia and Komi were summarized and analyzed. A significant decrease in the frequency of reproduction outbreaks of certain types of needle- and leaf-eating pests was shown, which corresponds to the trends for some other regions. For the pine looper (Bupalus piniaria (L.)), the pine beauty (Pannolis flammea), the buff-tip (Phalera bucephala (L.)), the rusty tussock moth (Orgyia antiqua (L

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Mukhamadiev, N. S., G. Zh Mendibayeva, and E. Dauletkeldi. "Invasive pest - oak pest (Profenusa pygmaea Klug, 1814)." Kazakhstan zoological bulletin 2, no. 2 (2021): 53–56. http://dx.doi.org/10.54944/kzbat384hl35.

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Petiolate oak Quercus robur is the type species of the genus Quercus Oak of the Beech family Fagaceae, a large tree reaching a height of 30-40 m, forming broad-leaved forests (oak forests) in the south of the forest and in the forest-steppe zones. The species is listed in the Red Book of the International Union for Conservation of Nature. Currently, as a result of anthropogenic activities, tens of thousands of species of animals (insects) and plant organisms move around the planet every day. At the same time, many of them lead to very serious environmental, social and economic consequences. Th

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Cooke, Barry J., Brian R. Sturtevant, and Louis-Etienne Robert. "The Forest Tent Caterpillar in Minnesota: Detectability, Impact, and Cycling Dynamics." Forests 13, no. 4 (2022): 601. http://dx.doi.org/10.3390/f13040601.

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If periodically outbreaking forest insects are a generic source of forest decline, then why do outbreaks recur more periodically than decline episodes? Do standard field survey data and proxy data systematically underestimate the complexity in herbivore population dynamics? We examine three sources of previously un-analyzed time-series data (population, defoliation, and tree-ring radial growth) for the forest tent caterpillar, Malacosoma disstria Hübner (Lepidoptera: Lasiocampidae) feeding on trembling aspen, Populus tremuloides Michx. (Salicaceae), in Minnesota, in order to answer these quest

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LeBoldus, Jared M., Shannon C. Lynch, Andrew E. Newhouse, et al. "Biotechnology and Genomic Approaches to Mitigating Disease Impacts on Forest Health." Annual Review of Phytopathology 62, no. 1 (2024): 309–35. http://dx.doi.org/10.1146/annurev-phyto-021622-114434.

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Outbreaks of insects and diseases are part of the natural disturbance regime of all forests. However, introduced pathogens have had outsized impacts on many dominant forest tree species over the past century. Mitigating these impacts and restoring these species are dilemmas of the modern era. Here, we review the ecological and economic impact of introduced pathogens, focusing on examples in North America. We then synthesize the successes and challenges of past biotechnological approaches and discuss the integration of genomics and biotechnology to help mitigate the effects of past and future p

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Krams, Ronalds, Tatjana Krama, Guntis Brūmelis, et al. "Ecological traps: evidence of a fitness cost in a cavity-nesting bird." Oecologia 196, no. 3 (2021): 735–45. http://dx.doi.org/10.1007/s00442-021-04969-w.

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AbstractHabitat quality has direct effects on the evolutionary fitness of breeding organisms, which is why it is believed that animals tend to have an evolved preference for the best possible habitats. However, some animals may mistakenly choose to reproduce in habitats that decrease their fitness, resulting in ‘ecological traps’. In this study, we tested whether great tits (Parus major) attracted to areas affected by outbreaks of the great web-spinning sawfly (Acantholyda posticalis) had fitness detriments characteristic of ecological traps. Sawfly larvae consume pine needles, which decreases

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Лямцев, Н. И. "Insect mass outbreak dynamics analysis based on monitoring Data in voronezh region forests." Лесохозяйственная информация, no. 1 (March 14, 2024): 99–108. http://dx.doi.org/10.24419/lhi.2304-3083.2024.1.08.

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На основе анализа архивных материалов статистической отчетности по защите лесов и государственного лесопатологического мониторинга приведена многолетняя (1963–2022 гг.) динамика площадей очагов 8-ми наиболее опасных хвое- и листогрызущих насекомых в лесах Воронежской обл. При сравнительно небольшой абсолютной площади очагов вредителей и болезней они охватывают в среднем ежегодно значительную часть (13,9 %) лесов: хвоегрызущие вредители – 2,9 %, листогрызущие – 4,8 %, прочие насекомые – 2,0 %, болезни – 4,2 %. Особую опасность представляют сосновые шелкопряд, пяденица и совка, массовое размноже

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Hosseini-Chegeni, Asadollah, and Majid Tavakoli. "Molecular identification of some immature Lepidoptera causing Quercus L., defoliation in Lorestan province, western Iran (Insecta: Lepidoptera)." SHILAP Revista de lepidopterología 51, no. 204 (2023): 641–52. http://dx.doi.org/10.57065/shilap.787.

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Quercus L., dominate almost 40% of Iran’s forest area. The second destructive group of insects is defoliator Lepidoptera distributed in the Zagros forests of Iran. We assessed Lepidoptera communities in Zagros forests ecosystems in Lorestan province, western Iran during a ca. 2-yr period that coincided with defoliation outbreaks experienced by this area. A number of 500 lepidopteran larva feeding Quercus leaves handy were collected. The phylogenetic relationship of Lepidoptera was analysed using BEAST software based on the Bayesian Inference method. In total, 14 lepidopteran taxa were identifi

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Mezei, Pavel, Mária Potterf, Jaroslav Škvarenina, Jakob Gulddahl Rasmussen, and Rastislav Jakuš. "Potential Solar Radiation as a Driver for Bark Beetle Infestation on a Landscape Scale." Forests 10, no. 7 (2019): 604. http://dx.doi.org/10.3390/f10070604.

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In recent decades, Norway spruce (Picea abies L. Karst.) forests of the High Tatra Mountains have suffered unprecedented tree mortality caused by European spruce bark beetle (Ips typographus L.). Analysis of the spatiotemporal pattern of bark beetle outbreaks across the landscape in consecutive years can provide new insights into the population dynamics of tree-killing insects. A bark beetle outbreak occurred in the High Tatra Mountains after a storm damaged more than 10,000 ha of forests in 2004. We combined yearly Landsat-derived bark beetle infestation spots from 2006 to 2014 and meteorolog

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Grodzki, Wojciech. "Entomofauna of dying young spruces Picea abies (L.) Karst. in the area after forest decline in the Izerskie Mountains." Folia Forestalia, Series A - Forestry 51(2) (March 1, 2009): 161–70. https://doi.org/10.5281/zenodo.30731.

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The results of the study on entomofauna infesting young (25– 45 years) Norway spruces (Picea abies [L.] Karst.) in the area formerly affected by forest decline in the Izerskie Mountains (Western Sudetes), are presented in the paper. Entomological analyses were carried out on tree sections (0.5 m long) obtained from 50 trees (3 sections each) as well as during photoeclector rearing of tree samples (28 sections 0.5 m long). Bark- and wood-boring insects of 21 species and 1 genus were found. The dominant species was Pityogenes chalcographus L. (88% frequency in field analyses) usually accom

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Novais, Samuel. "Contrasting effects of habitat management on different feeding guilds of herbivorous insects in cacao agroforestry systems." Revista de Biología Tropical 64, no. 2 (2016): 763. http://dx.doi.org/10.15517/rbt.v64i2.19100.

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Human pressure on natural habitats increases the importance of agroforests for biodiversity conservation. The objective of this study was to evaluate the role of traditional cacao agroforests, known as “cabrucas,” on the conservation of the herbivorous insect community in compared with that of monodominant rubber agroforests. The insects were sampled in three habitats in southeastern Bahia, Brazil: native forests, cabrucas and rubber agroforests. In each habitat, 18 plots of 10 m<sup>2 </sup>were established, and the structural measures were collected and herbivorous insects were s

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