Assessment of the Type of Deficit Irrigation Applied during Berry Development in ‘Crimson Seedless’ Table Grapes

This work assessed the effects of sustained (during whole berry growth) and regulated (at post-veraison) practices deficit irrigation on water relations, yield components quality in a commercial vineyard ‘Crimson Seedless’ table grapes. For this, five treatments were established during complete season (from April to October): (i) Control (CTL) irrigated 110% crop evapotranspiration (ETc); (ii) Regulated Deficit Irrigation (RDI) at 50% CTL non-critical period post-veraison; (iii) Sustained (SDI), throughout entire growing season; (iv) Partial Root-Zone Drying (PRD), similar RDI but alternating applied dry side every 10–14 days; (v) (SPRD), as SDI days. PRD received 24% 28% less than CTL, respectively. These reductions higher SPRD (65% 53%, respectively). Total was not affected by any DI strategy. Only significantly lower productive values observed weight height berries compared CTL. However, color parameters evaluated increased all treatments, being slightly with PRD. In addition, total soluble solids (TSS) SDI, other counterparts. Our findings showed that application growth using can be considered for scheduling grapes when aim is solve trouble insufficient reddish berries.