Depositon monitoring of pesticides. Part 2. South Germany

Rain samples were collected at 3 different sites and were analysed for some selected pesticides (Lindan, Isoproturon, Triadimenol, Pirimicarb, Parathion-ethyl and Atrazin) as well as for Fluoranthen and Phenanthren. The rainwater was collected by Daemmgen-bulk-collectors over time periods of two weeks. Additional, two sites were equipped with a wet-only-collector. Parathion-ethyl, Pirimicarb and Triadimenol were detected in only a few samples. Atrazin and Isoproturon showed strongly annual variations. Only Lindan appeared in almost every sample during the entire year. The observed concentrations ranged between 3 and 300 ng 1((-1)). For single substances good correlations were found between the annual variation and the time period of agricultural application. The annual average concentration is for all substances below 50 ng 1((-1)). Deposition rates were calculated and presented. The part of dry deposition depends on the substances and the weather and ranges between 10 and 20% of the total deposition.