Disecantes Product Use in the Raisin Grape Production

The Caborca, Sonora, region, is the main producing zone of raisins grape in Mexico, with a surface of 5000 ha. Nevertheless although that produce raisins of excellent quality, it is frequent that during the drying time, some rain ocurre and cause loses in yield up to a 30% and the quality is affected. The objective of this study was the evaluation of several chemical disecantes agents to reduce the drying time of the raisins grape. This study was carry in the INIFAP Caborca. We evaluate eleven treatments containing diferent concentrations of Metil Oleate, Potassium Carbonate, Potassium Sorbate and combinations of these products, a mesh and the control were included, these applications were made immediately after cut the grape, once it was tended on the bed. The results indicate that the best treatment were the mixture made from Metil Oleate plus Potassium Carbonate at 4% both products followed by the same mixture at 2%, those treatments reduced the drying time in a 50% and 35 % respecively. When using the mesh the drying time was extend, it need 4 days more than the control, since its total time of drying was 21 days. It is important to note that the treatments that contain the mixture of metil oleate and potassium carbonate and the mesh not presented rotting problems, during the drying stage.