Ana Maria Almașanu, Monica Herea, Nela Talmaciu, Renata Sipos, Mihai Talmaciu
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diapause, Eurygaster integriceps, migration
The species Eurygaster integriceps (suun pest) has a biological cycle that is significantly influenced by climatic conditions. Diapause, which lasts between 8 and 9 months, is divided into two stages: aestivation (during the warm season) and hibernation (during the cold season). Aestivation ranged from 3 to 4.5 months during 2020-2024, and hibernation gradually decreased from 7 months in 2020 to 4 months in 2024, reflecting milder winters. These changes indicate an adaptation to changing climatic conditions and a greater potential for impact on crops. Spring season migration begins in April, and mass migration occurs when temperatures exceed 10°C, lasting between 55 and 75 days, depending on the year. The time of migration from field to forest is longer than the migration in the opposite direction. In 2024, migration was faster, suggesting possible climate change. The species prolificacy increased steadily between 2020 and 2024, from 25% to 50%, influenced by fat consumption and feeding conditions. Feeding of plants in the grass family favors efficient reproduction, and embryonic development differs significantly, so in 2024 it was considerably extended (25 days). The essential processes of the bedbug are supported by warm, dry and bright conditions, while cold and wet weather, accompanied by winds, limit them. These conditions are fundamental for migration, sexual maturation, feeding, reproduction, hatching and development. Their effective management is essential for the management of infestations. In addition, nutrition has a significant restrictive role when the growth of the host plant progresses ahead of the pest cycle, inhibiting its normal development.
Cite this paper: Almasanu, A.M., Herea, M., Talmaciu, N., Sipos, R., Talmaciu, M. (2025). OBSERVATIONS ON DIAPAUSE AND MIGRATION OF THE EURYGASTER INTEGRICEPS SPECIES IN THE CLIMATIC CONDITIONS OF THE IAȘI AREA DURING 2020-2024. Current Trends in Natural Sciences, 14(27), 28-35. https://doi.org/10.47068/ctns.2025.v14i27.004
