Code:
OIV
464
Name: Cluster: degree of resistance to black rot
Category:
,
GROUP OF CHARACTERISTICS,
ORGAN
Subcategory:
BLACK ROT,
BIOTIC RESISTANCE - FUNGUS,
LEAF - MATURE,
LEAF - YOUNG
Code: OIV 464
Name: Cluster: degree of resistance to black rot
Category: , GROUP OF CHARACTERISTICS, ORGAN
Subcategory: BLACK ROT, BIOTIC RESISTANCE - FUNGUS, LEAF - MATURE, LEAF - YOUNG
Primay descriptor priority list
For a quick characterisation of varieties the Genres CT 96 No81 - partners compiled a Primary description priority list. The list encompasses 14 priority one primary descriptors. The chosen descriptors show a good discriminating power between varieties. Most of them are easy to score.
Description
To observe in environments usually affected by the black rot (Phyllosticta ampelicida). Examination at least in two growth stages: berry growth and bunch closure. Verify the extent and size of the typical lesions / spots of damaged berries that rot in a short time, covered with pycnidia, and become mummies strongly attached to the pedicel. 1 = Almost all the bunches involved, with a high frequency of damaged berries. 3 = Most of the bunches involved, with a high frequency of damaged berries. 5 = Few bunches affected with medium incidence of damaged berries. 7 = Only partially damaged berries. 9 = No visible symptoms.Level expression
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