Tomato is the most consumed vegetable in Colombia. During its production indiscriminate use of pesticides is common. Therefore, the aim was to evaluate the presence of pesticides in peel and pulp of tomatoes from greenhouses and open field crops. To achieve it, 32 composite samples (1kg.each) were collected randomly in both systems. The presence of 30 common used pesticides was analyzed using a modified QuEChERS extraction method and the determination through a ultra performance liquid chromatograph coupled to mass spectrometry. As a result, 12 pesticides were found in the total samples. In tomato pulp from open field crops pesticides detected that exceed LMR(FAO,UE) were Dimetomorph(0.047mg*kg?�), Methomyl(0.027mg*kg?�), from greenhouses were Acephate(0.290mg*kg?�) , Indoxacarb(0.708mg*kg?�), Thyociclam(0.182mg*kg?1). In tomato peel from open field crops pesticides that exceed LMR(FAO,UE) were, Azoxystrobin(0.011mg*kg?�), Carbofuran(0.045mg*kg?�), Difeconazole(0.589mg*kg?�), Methomyl(0.033mg*kg?�), from greenhouses were Azoxystrobin(0.037mg*kg?�), Thyociclam(0.798mg*kg?�). Open field samples were more contaminated. Greatest number of pesticides were found in peel than pulp.

Determination of pesticide residues in cuticular and sub-cuticular tissues in tomato grown in greenhouses and open field farming systems in Colombia

248th National Meeting (2014)

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