The principal objective of this study was to evaluate the behavior of six pesticides (chlorpyrifos, fenarimol, mancozeb, metalaxyl, penconazole, vinclozolin) used in vineyard to control berry moth, powdery mildew, downy mildew, and gray mold and to obtain dissipation curves on grapes in the specific climatic conditions of the Jumilla wine producing region (southeast Spain). Six commercial formulations, one for each of the six pesticides listed above, were spayed at the preharvest time of respectively 21, 28, 15, 21, 14, and 21 days. To study time-course changes in residue levels, the first sample was taken on the same day as application and then 1, 3, 7, 14, and 28 days after application. The change in vinclozolin levels with time showed that as early as day seven the level was below the limit established by law (5mg/kg). In the case of the insecticide chlorpyrifos, the residue level fell below the limit of 0.5 mg/Kg after 14 days. The residual level after 28 days was 0.06mg/kg for fenarimol 0.10 for metalaxyl, 0.22 for mancozeb and 0.03 for penconazole. Half times for penconazole and mancozeb were 12 and 13.5 day, respectively, which are slightly longer than those of the previously mentioned pesticides (6.6, 4.4, 7.8, and 8.3 days). The statistical calculation for the six compounds confirmed that there was a correlation between the residual level and time. The time necessary to reach the maximum residue limit was, in all cases, below the established preharvest time for each of the pesticides.
Abstract The management and disposal of large amounts of grape..
Ayuso, S.1 Fernández-Pérez, R.2 Moreta, C.1 Tenorio, Carmen and 1Ruiz-Larrea,..
The demand for a sustainable economy and resource conservation is..
The seasonal character of harvests limits winemaking considerably, especially oenological..
