Comparative toxicity of chlorothalonil: Ceriodaphnia dubia and Pimephales promelas

RM Sherrard, CL Murray-Gulde, JH Rodgers Jr… - Ecotoxicology and …, 2003 - Elsevier
RM Sherrard, CL Murray-Gulde, JH Rodgers Jr, YT Shah
Ecotoxicology and Environmental Safety, 2003Elsevier
Chlorothalonil is a commonly used fungicide in rural and urban environments and can be
incidentally introduced into aquatic systems through rainfall runoff or direct overspray and
drift from aerial applications. Few studies have been published regarding risks to aquatic
organisms exposed to chlorothalonil, so this study was performed to provide a first-order risk
characterization for receiving system biota. Definitive laboratory toxicity tests were
conducted with aqueous solutions of chlorothalonil and sentinel aquatic organisms …
Chlorothalonil is a commonly used fungicide in rural and urban environments and can be incidentally introduced into aquatic systems through rainfall runoff or direct overspray and drift from aerial applications. Few studies have been published regarding risks to aquatic organisms exposed to chlorothalonil, so this study was performed to provide a first-order risk characterization for receiving system biota. Definitive laboratory toxicity tests were conducted with aqueous solutions of chlorothalonil and sentinel aquatic organisms (Ceriodaphnia dubia Richard and Pimephales promelas Rafinesque). P. promelas was more sensitive (7-day potency=6.1% mortality/μg/L) than C. dubia (7-day potency=0.94% mortality/μg/L) to chlorothalonil exposures. All mortality of P. promelas and C. dubia resulting from these chlorothalonil exposures occurred within the first 96h and no sublethal effects (i.e., growth or reproduction) were detected under these experimental conditions following 7-day exposures.
Elsevier
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