The main objective of this work was to determine the impact of pesticide use practices on groundwater Sais in Morocco using passive water samplers (Polar organic chemical integrative samplers). A preliminary survey involving 110 farmers, showed the application of pesticides belonging to different groups on vegetable crops and orchard. In view of survey results, the potato vine crops and orchards record the most important use pesticides. We found that 65 commercial preparations are used, 14 insecticides, 21 fungicides, 26 herbicides, 3 insecticide-acaricide and 1 nematicide. Use practices in terms of application intervals and methods, measuring tools and dosage were not in compliance with good agricultural practices. The application frequency indicator was used as an indicator for select POCIS exposure wells to monitor the occurrence of pesticides selected from a survey. The two types of POCIS samplers were deployed in 22 wells in the study area in Morocco for a 21-day period before and after application of pesticides. The pesticides and metabolites were extracted not only from Oasis HLB sorbent but also from the polyethersulfone (PES) membrane of the POCIS. The aim her is to determine sampling rates from in-situ calibration, with the objective of assessing the impact of environmental conditions on POCIS field performance. The laboratory analysis of the POCIS exposed in well water is still carried out. This monitoring campaigns have been undertaken to obtain in situ sampling rate values.<br/>

Pesticide monitoring using passive sampling for in ground water from Sais, Morocco

255th National Meeting (2018)

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