University of Guilan Caspian Journal of Environmental Sciences 1735-3033 23 1 2025 01 01 Biology, harmfulness and improvement of control measures against cabbage stem flea beetle, Psylliodes chrysocephalus Linnaeus, 1758 (Coleoptera: Chrysomelidae) 165 172 8569 10.22124/cjes.2025.8569 EN Bekzat Mombayeva Department of Biology, Faculty of Natural Sciences, M.H. Dulati Taraz University, Taraz, Kazakhstan Nagima Tumenbayeva Department of Biology, Plant Protection and Quarantine, Faculty of Agronomy, Kazakh Agrotechnical Research University named after S. Seifullin, Astana city Kazakhstan Gulnara Akhauova Department of Biology, Faculty of Natural Sciences, M.H. Dulati Taraz University, Taraz, Kazakhstan Assel Karabayeva Department of Biology, Faculty of Natural Sciences, M.H. Dulati Taraz University, Taraz, Kazakhstan Аyagoz Mendigaliyeva Institute of Education and Management, West Kazakhstan Innovative Technological University, West Kazakhstan region, Uralsk, Kazakhstan Roza Bakessova Institute of Education and Management, West Kazakhstan Innovative Technological University, West Kazakhstan region, Uralsk, Kazakhstan Gaukartas Abysheva Department of Biology, Plant Protection and Quarantine, Faculty of Agronomy, Kazakh Agrotechnical Research University named after S. Seifullin, Astana city Kazakhstan Gulzat Yessenbekova Department of Biology, Plant Protection and Quarantine, Faculty of Agronomy, Kazakh Agrotechnical Research University named after S. Seifullin, Astana city Kazakhstan Journal Article 2025 03 03 <em>Psylliodes chrysocephalus</em> L., a significant pest affecting cruciferous crops, causes substantial agricultural damage due to its biological and ecological traits. This study investigates the species' life cycle, host preferences, and environmental adaptability, revealing that adults and larvae preferentially target young plants, reducing crop vigor and yield losses of up to 20% in some regions. The pest's rapid reproductive rate—capable of laying up to 1000 eggs per female—and resistance to conventional insecticides exacerbate its economic impact. Current control strategies rely heavily on synthetic pesticides but are increasingly ineffective and pose risks to non-target organisms. To address these challenges, integrated pest management (IPM) approaches were evaluated, combining biological control agents (<em>e.g., entomopathogenic fungi</em>) with cultural practices like crop rotation and selective insect growth regulators. Field trials demonstrated that IPM strategies reduce pest populations by up to 60% while minimizing environmental harm. Additionally, genomic insights into <em>P. chrysocephalus</em> detoxification mechanisms inform the development of targeted insecticides capable of overcoming existing resistances. https://cjes.guilan.ac.ir/article_8569_18aaa56383060b1f2d469fd7101a1bd7.pdf