Edible Plant Extracts against and Validation of a L. Ethanolic Extract as a Natural Insecticide.

The mosquito significantly impacts public health, with vector control remaining the most efficient means of reducing the number of arboviral disease cases. This study screened the larvicidal and pupicidal activity of common edible plant extracts. L. (black pepper) extract production was optimized using accelerated solvent extraction (ASE) and validated following regulatory requirements using HPLC-PDA analytical methodology to quantify its major component-piperine. Larvicidal activity was determined for the standardized fruit ethanol extract (LC 1.1 µg/mL) and piperine standard (LC 19.0 µg/mL). Furthermore, 9-day residual activity was determined for the extract (4 µg/mL) and piperine (60 µg/mL), with daily piperine quantification. Semi-field trials of solid extract formulations demonstrated 24-day activity against larvae. Thus, the standardized extract emerges as a potential candidate for insecticide development to control the arboviral vector.