Acute and chronic toxicity of difenoconazole fungicide on freshwater shrimp (Macrobrachium lanchesteri)
by Harlina Ahmad; Muhammad Radzi Abd Rahman; Shahizatul Fatihah Jamal Abdul Nasir; Nurul Syuhada Haji Baharudin
International Journal of Environmental Engineering (IJEE), Vol. 11, No. 3, 2022

Abstract: The toxicity of difenoconazole, a fungicide belonging to the triazole group of compounds, upon the freshwater shrimp (Macrobrachium lanchesteri sp.) was assessed within a laboratory setting. Shrimps were exposed to five different concentrations (0.33, 0.65, 1.30, 3.25, and 6.50 mg/L) of difenoconazole. The lethal concentration for 50% mortality in the population (LC50) determined the acute toxicity level of the compound, whilst chronic toxicity was derived from its no-observed effect concentration (NOEC). Subsequently, the LC50 and NOEC values observed for M. lanchesteri were determined to be 2.91 mg/L and 0.79 mg/L, respectively. This study demonstrated that aside from the intended anti-fungal effects of difenoconazole fungicides, they may also be toxic to off-target organisms, particularly M. lanchesteri.

Online publication date: Fri, 29-Jul-2022

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