Effects of nitrogen and irrigation on the quality of grapes and the susceptibility to Botrytis bunch rot

Therefore, nitrogen fertilization and irrigation of vineyards should be undertaken carefully to avoid negative effects and apply the best management practices that optimize N use and irrigation efficiency. The results of this study showed that a dosage of 150 kg/ha of ammonium nitrate is recommended in sandy loam soils with a relatively high pH. Irrigation of vineyards at 60% evapotranspiration rate is also recommended.