Determining a Midday Stem Water Potential Threshold for Irrigation of Table Grapes Water potential threshold

Sustainable table grape production depends on efficient water supply. Water potential is a useful indicator of constraints in grapevines. In this regard, midday stem (ΨS) considered to be better grapevine status than leaf (ΨL). The objective the study was determine threshold set soil refill lines for irrigation. However, previous studies carried out locally, only ΨL measured. relationship between ΨS and determined ten selected cultivars. Since there were no differences cultivars, single equation could used convert measured with grapes ΨS. Vegetative growth, berry mass colour, as well juice total soluble solids (TSS) data pooled, related This showed that -0.8 MPa seems pre-harvest period will allow sustainable growth size anisohydric optimum colour -1.0 MPa. Consequently, can points irrigation where content regular basis vineyards.