TRANSGENERATIONAL EFFECTS OF CHLORANTANILIPROLE ON BIONOMICS OF HELICOVERPA ARMIGERA (HÜBNER)

Abstract

The lethal and sublethal effects of chlorantraniliprole against Helicoverpa armigera were evaluated to review its impact on life table parameters and population dynamics. Exposure to lethal and sublethal concentrations (LC₂₅ and LC₅₀) significantly disrupted critical developmental and reproductive behavior of H. armigera. The result demonstrated that in the treated groups the larval and pupal duration were remarkably shortened, while adult lifespan was also reduced in LC₂₅ and LC₅₀ exposure, respectively, in comparison with control. The treated population displayed a substantial reduction in key population dynamics parameters, specifically the net reproduction rate (Ro), intrinsic growth rate of increase (rm), and gross reproduction rate (GRR) with LC₂₅ exhibiting more prominent suppression than LC₅₀. Conversely, the population doubling time (T) decreased significantly at both concentrations, indicating accelerated population rate. The study indicates that sublethal doses impair physiological and reproductive behavior in H. armigera, which potentially suppressing population over long-term periods. However, at low concentrations slight physiological damage may induce, driving to resistance evolution. The study emphasizes the dual role of chlorantraniliprole in Integrated Pest Management (IPM), while effective at reducing population growth, its sublethal effects impose to lessen spontaneous ecological harms and resistance development.