Residues folpet in grape Žilavka and Blatina varieties from plantation cultivation and in the small vineyard.
The application of pesticides is a necessary measure in the cultivation of grapevine. Fungicides, in comparison to other pesticides, are the most often used in vineyards due to the sensitivity of grapevine on the most common diseases caused by pathogenic fungi (Plasmopara viticola, Uncinula necator and Botrytis cinerea), which reduce the yield and quality of grapes. Frequent use and misuse regardless respecting of preharvest period, causes acumulation of fungicide active substances in grapes, and then their transfer into the wine. In this paper the results of the residues of folpet in two most frequently grown varieties of wine grape (Žilavka and Blatina) from plantation cultivation and in the small vineyard are presented. The device GC/MS Agilent 7890A/5975C and analysis method UNI EN 15662:2009 QuEChERS was used for determination of residues of folpet. Determined concentrations of residues of folpet in grapes of Žilavka and Blatina grown in 2011 in two plantations and in the small family vineyard were below the MRL value (Maximum Residue Levels) determined for folpet with Regulation (EC) No. 396/2005, which for wine grapes is 5 mg / kg as well with Regulations on the quantities of pesticides and the other toxic substances, hormones, antibiotics and mycotoxins that may be present in food ("Official gazette of SFRJ", No. 59/83 and 79/87) that for folpet is 2 mg/kg.