Interannual variation in major stored-grain insect pest populations in wheat storage facilities in Türkiye
Journal of Stored Products Research, cilt.119, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 119
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.jspr.2026.103163
- Dergi Adı: Journal of Stored Products Research
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Compendex, Zoological Record
- Anahtar Kelimeler: Abiotic factors, Population dynamics, Rhyzopertha dominica, Sitophilus oryzae, Stored wheat, Tribolium castaneum
- Ankara Üniversitesi Adresli: Evet
Özet
Temperature and relative humidity are important abiotic factors associated with variation in stored-product insect pest abundance. This study evaluated interannual changes in the abundance, provincial occurrence, and relative abundance of major stored-grain pests in wheat storage facilities in Türkiye. The research was conducted in 2023 and 2024 in commercial wheat storage facilities located in 21 provinces representing seven geographical regions of Türkiye. Periodic surveys identified Sitophilus oryzae (L.) (Coleoptera: Curculionidae), Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae) and Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) as the main pest species. A total of 8342 individuals were detected in 2023, compared to 4904 in 2024. Sitophilus oryzae was the most frequently encountered species, detected in 90.48% of the sampled provinces in 2023 and 100% in 2024; however, its share of the combined populations of the three species decreased from 73.46% in 2023 to 59.40% in 2024. Rhyzopertha dominica remained an important component of the pest complex, particularly in warmer and drier locations such as Konya, Tekirdağ, and Manisa. The relative abundance of T. castaneum increased from 3.68% to 32.79%, while its occurrence expanded from 33.33% to 85.71% of the sampled provinces; this increase was particularly pronounced in Manisa, Çankırı, and Samsun. The results suggest that higher ambient temperatures were associated with species-specific changes in pest abundance and composition, particularly the increased relative contribution of T. castaneum, whereas total abundance and the abundance of S. oryzae and R. dominica declined in 2024. They also demonstrate that climate fluctuations necessitate province-based risk assessment in storage pest management.