Pesticide residue monitoring in green beans from Sous-Massa Valley in Morocco

摘要

Two hundred twenty-seven samples green beans samples from an agricultural region of the souss (Agadir, Morrocco) were analyzed for Azoxystrobin, Carbendazim, Cyromazine, Difenoconazole, Hexythiazox, Imidacloprid, Methomyl, Myclobutanyl, Oxamyl, Propamocarb and Thiachloprid. For fourteen samples that contained pesticide residues, sach as Hexythiazox, Imidacloprid and Myclobutanyl have a percentage of detection 11% for each molecule. For Hexythiazox the concentration ranges of 0.09 to 0.12 mg kg-1 for Myclobutanyl, from 0.013 to 0.100 mg kg-1 for Imidacloprid, from 0.019 to 0.055 mg kg-1. For Cyromazine, Methomyl, Propamocarb and Thiachloprid from 0.012 to 0.045 mg kg-1, 0.011 to 0.025 mg kg-1, 0.011 to 0.032 mg kg-1, 0.010 to 0.102 mg kg-1 respectively. A group of three active substances namely: Azoxystrobin, Difenoconazol and Carbendazim respectively have the concentration range for Azoxystrobin from 0.016 to 0.12, from 0.014 to 0.052 and from 0.010 to 0.121. The concentrations found for this group are strictly below the MRLs. European MRLs for Methomyl in green beans set in 0.02 mg kg-1 was exceeded in 2 samples. We also record an excess in respect of Eu MRLs in the case of Oxamyl.