Abstract

Due to drift during application a pesticide is emitted to surface waters. The evaluation of this situation concerns the possible effects for water organisms. The report describes the method to calculate the exposure concentration due to biodegradation, evaporation, sedimentation, and resuspension in relation to the dosage and the application frequency. distinction is made between short and long term exposure. The model has been programmed in Lotus 1-2-3 TM and is available on request.