Eur. J. Entomol. 121: 425-434, 2024 | DOI: 10.14411/eje.2024.046

Exploring the relationship between characteristics of forest stands and the behaviour of Lymantria dispar (Lepidoptera: Erebidae) from a temporal and spatial perspectiveOriginal article

Flavius BĂLĂCENOIU ORCID...1, Dragoș TOMA ORCID...1, 2, *, Constantin NEȚOIU ORCID...1
1 National Institute for Research and Development in Forestry Marin "Drăcea", Eroilor 128, 077190 Voluntari, Romania; e-mails: flavius.balacenoiu@icas.ro, dragos.toma@icas.ro, c_netoiu@yahoo.com
2 Faculty of Silviculture and Forest Engineering, Transilvania University of Brașov, Sirul Beethoven 1, 500123 Brașov, Romania

In the context of ongoing threats to forest ecosystems, this study investigates the temporal and spatial dynamics of Lymantria dispar defoliation intensity over a period of three years. We analysed the relationship between the insects' reproductive and feeding behaviours and forest stand characteristics, exploring the key factors that shape this behaviour. The results revealed a dynamic pattern, with a significant escalation of defoliation starting from the second year and peaking in the third. The analysis highlighted that, among several forest stand characteristics, woody species abundance and specific forest composition significantly influence population density and defoliation intensity. Sporadic outbreaks of the insects were associated with stand features, posing major challenges to forest health. These findings make a significant contribution to understanding the population dynamics of L. dispar and provide essential insights for forest managers in efficiently managing this defoliator. By highlighting the complex interactions between the insect and its environment, this study lays the groundwork for conservation and protection strategies for forest ecosystems.

Keywords: Defoliation, insect outbreaks, forest pests, reproduction, population dynamics

Received: March 8, 2024; Revised: November 4, 2024; Accepted: November 4, 2024; Published online: November 26, 2024  Show citation

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BĂLĂCENOIU, F., TOMA, D., & NEȚOIU, C. (2024). Exploring the relationship between characteristics of forest stands and the behaviour of Lymantria dispar (Lepidoptera: Erebidae) from a temporal and spatial perspective. EJE, 121, Article 425-434. https://doi.org/10.14411/eje.2024.046
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