Fig. 2
Transpiration rate (EL) measured in 5C (a) and Riesling grafted on 5C (b) during treatments application (n = 4–7). W = well-watered plants; D = drought-stressed; C = control, non-phylloxerated; P = root phylloxerated. Letters and asterisk indicate statistically significant difference within Irrigation (Factor I; W and D) and Infestation (Factor II; C and P), respectively. A significant interaction between factors (Irr x Inf) was observed in 5C on the 49th day after inoculation, i.e. within W level: C > P; within C level: W > D