Figure 1. Premature berry dehydration (PBD) symptoms.
(a) cv. Merlot healthy cluster.
(b) Premature dehydrated berries in field conditions may be observed randomly in each plant and cluster.
(c) Berry skin wrinkling is evident on the surface of dehydrated berries.
(d) No bunch stem necrosis is observed in PBD.
(e-f) Anthocyanin pigmentation is present in the terminal bunch stem and necrosis is observed in the pedicels.
(g) Healthy pedicel.
(h) Details of a necrotic PBD pedicel.
(i) Berries suffering PBD are only loosely attached to the pedicel.