Akademik Veri Yönetim Sistemi
Crop Protection, cilt.202, 2026 (SCI-Expanded, Scopus)
This study examined the effects of three insecticides—Deltamethrin, Cypermethrin, and Chlorantraniliprole—at different doses (LC30, LC40, and LC50) on the demographic parameters of the green peach aphid Myzus persicae Sulzer, 1776 (Hemiptera: Aphididae). Populations of M. persicae reared on pepper plants (Capsicum sp.) were used in the experiments. The trials were conducted in a climate-controlled chamber (25 ± 1 °C, 60 ± 5 % RH, 16:8 h L:D photoperiod). Lethal concentrations of each insecticide were determined using probit analysis, and subsequent life table analyses were performed at LC30–LC50 levels using the age–stage, two-sex life table approach. Data were processed with TWOSEX-MSChart and TIMING-MSChart software, and statistical differences among treatments were assessed using the bootstrap method. Results showed that increasing insecticide concentrations significantly affected development, longevity, and fecundity traits of M. persicae. The longest nymphal and pre-adult development periods were observed at the LC50 level of Deltamethrin, while the shortest were recorded at LC30 of Chlorantraniliprole. Higher doses led to significant reductions in adult longevity, total lifespan, and reproductive potential. The lowest values of net reproductive rate (R0), intrinsic rate of increase (r), and the finite rate of increase (λ) were found in the Deltamethrin LC50 treatment, while the highest (excluding control) occurred under Chlorantraniliprole LC30. Age–stage survival rate (sxj) and life expectancy (exj) also decreased with insecticide exposure, with marked population reductions observed at higher concentrations. Overall, the results indicate that pyrethroid insecticides—particularly Deltamethrin and Cypermethrin—impede the population growth of M. persicae by prolonging development, reducing fecundity, and shortening lifespan. Considering low lethal effects, Chlorantraniliprole exhibited milder adverse effects at low doses. These findings highlight the importance of considering sublethal effects on population dynamics when designing sustainable and environmentally sound integrated pest management (IPM) programs.