Effects of insecticide stress on the demographic parameters and population dynamics of Aphis fabae Scopoli (Hemiptera: Aphididae)
Crop Protection, cilt.209, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 209
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.cropro.2026.107767
- Dergi Adı: Crop Protection
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Environment Index, Geobase, Zoological Record
- Anahtar Kelimeler: Demographic traits, Insecticide stress, Life table analysis, Population projection, Sublethal exposure
- Yozgat Bozok Üniversitesi Adresli: Evet
Özet
This study investigated the sublethal effects of three commonly used insecticides, deltamethrin, cypermethrin, and chlorantraniliprole, on the biological and demographic parameters of Aphis fabae using an age-stage, two-sex life table approach. The main objective was to evaluate how sublethal concentrations influence the development, survival, reproduction, and population growth potential of the aphid population. Under controlled laboratory conditions, LC30, LC40, and LC50 concentrations were determined through bioassays, and their impacts on aphid life history traits were subsequently assessed. The results demonstrated that all tested insecticides significantly prolonged nymphal development while reducing adult longevity and fecundity compared with the control group. In addition, all treatments caused marked declines in life table and reproductive parameters. Among the tested insecticides, deltamethrin at LC50 produced the strongest reductions in reproductive performance and population growth metrics. Life table analyses revealed that the intrinsic rate of increase (r) and net reproductive rate (R0) decreased progressively with increasing concentrations of all insecticides, whereas the mean generation time (T) was extended. Although chlorantraniliprole exhibited relatively lower acute toxicity, it significantly suppressed population growth parameters under sublethal exposure conditions. Overall, the findings emphasize the ecological importance of sublethal insecticide effects and highlight the need to incorporate these effects into sustainable pest management strategies.