Acute Toxicity of Mancozeb (fungicide) on Juvenile Common Carp (Cyprinus carpio var. communis)

Abstract

Pesticides, particularly fungicides like Mancozeb (MZ), are extensively used in agriculture for controlling fungal pathogens, but their persistence in environmental systems poses significant risks to aquatic ecosystems. This study investigates the acute toxicity of Mancozeb on juvenile common carp (Cyprinus carpio var. communis) by assessing its effects through a 96-hour static bioassay. The study determined the median lethal concentration (LC50) values of Mancozeb at 24, 48, 72, and 96 hours. Water quality parameters during the bioassay remained stable, ensuring the reliability of the toxicity test. Results indicated that the LC50 values for Mancozeb decreased with increased exposure time, with values of 16.940, 13.615, 9.886, and 8.764 ppm at 24, 48, 72, and 96 hours, respectively, highlighting a concentration-dependent increase in fish mortality. The findings suggest that Mancozeb exhibits moderate toxicity to juvenile common carp with increased mortality over prolonged exposure. The study bridges the knowledge gap regarding the ecological impact of Mancozeb, emphasizing the importance of safe pesticide practices to mitigate risks to aquatic biodiversity and human consumers reliant on fisheries.