Bursa and Yalova provinces are very important centers of chestnut production and
processing. Chestnut blight is a serious disease of Castanea spp. and the only feasible
method to control it is the use of hypovirulence. Hypovirulence and vegetative compatibility
(vc) types of 198 isolates of Cryphonectria parasitica obtained from 15 different locations
from Bursa and Yalova provinces in three years were determined and discussed. Vc types of
C. parasitica isolates were evaluated by using six European vc types; EU-1, EU-2, EU-5, EU …

Cryphonectria parasitica obtained from 15 different locations from Bursa and Yalova
provinces in three years were determined and discussed. Vc types of C. parasitica isolates
were evaluated by using six European vc types; EU–1, EU–2, EU–5, EU–6, EU–12 and EU–
14. All strains were found to belong to EU-1 vc type. White mycelial growth which is typical
for hypovirulence was observed in 12% of the isolates. All these white-growing isolates were
found to contain ds-RNA. Presence of only one fungal vc type and one hypovirus subtype …