Resumo

V., DAVID LÓPEZ et al. Pesticide residues in strawberry fruits cultivated under integrated pest management and conventional systems in Cundinamarca (Colombia). rev.colomb.cienc.hortic. [online]. 2019, vol.13, n.1, pp.35-45. ISSN 2011-2173.  https://doi.org/10.17584/rcch.2019vl3il.8409.

Because of the high susceptibility in strawberry fruits to attacks from pests and diseases, a large amount of pesticides is applied during the crop cycle and harvest period. The improper use of these substances can generate residues in agricultural products that pose a risk to human health. The objective of this study was to determine and compare pesticide residues in strawberry fruits from two different production systems distributed in the main producing areas of the Cundinamarca Department (Colombia). Eight samples of strawberry crops were collected in four producer municipalities (Guasca, Facatativa, Mosquera and Sibate) to compare different systems (conventional production vs. production based on Integrated Pest Management, IPM). Samples with a concentration of 394 molecules were examined using liquid and gas spectrometry. Fischer's exact test was used to determine the association between the pesticide type and residue level in the fruits, with more insecticide samples that exceeded the permitted threshold than when using fungicides. Twenty-two different molecules were detected in the analyzed samples, with 37 detection events, of which eight were reported in the IPM production systems and 29 in the conventional producers. The results revealed that nine molecules of insecticides and two of fungicides exceeded the concentrations set by Colombian regulations, but no significant differences were found between the two production systems. The calibration of equipment and applications must be improved in order to avoid over-concentration of pesticides, especially insecticides.

Palavras-chave : Fragariaxananassa; IPM; pesticide restriction; pesticide legislation; threshold.

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