Inhaltszusammenfassung

Abstract Large amounts of fungicides are commonly applied to agricultural øelds, particularly vineyards. Following their application, fungicides may accidentally be introduced into agricultural surface waters posing a potential risk for the integrity of aquatic ecosystems. In this context, the present study characterized the aquatic fungicide exposure at base Æow and during rainfall- related runooe events in viticulture in Southern Palatinate (SW- Germany) between 2006 ...Abstract Large amounts of fungicides are commonly applied to agricultural øelds, particularly vineyards. Following their application, fungicides may accidentally be introduced into agricultural surface waters posing a potential risk for the integrity of aquatic ecosystems. In this context, the present study characterized the aquatic fungicide exposure at base Æow and during rainfall- related runooe events in viticulture in Southern Palatinate (SW- Germany) between 2006 and 2009. The mitigation performance of three vegetated ditches (VD) and øve vegetated detention ponds (DP) was assessed. The measurements uncovered the presence of 4 to 11 dioeerent fungicide compounds in each of the 81 samples. During runooe events, the ecotoxicological potential expressed as the sum of toxic units calculated based on the acute toxicity towards algae, Daphnia and øsh of some of the mixtures detected at the inlet of the VD or DP exceeded the Uniform Principle threshold set by the European Union. Both the VD and the DP systems reduced the median fungicide concentrations and thus their associated ecotoxicological potential by 56respectively. This fungicide mitigation eOEciency was mainly explained by the plant density and size-related properties of the vegetated systems. Although VP and DP are promising tools to mitigate fungicide exposure, a better mechanistic understanding of the factors triggering the remediation potential ønally feeding back into policy decision making is required.» weiterlesen» einklappen

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