Abstract:
Downy mildew (Plasmopara viticola Berk. & Curt.), powdery mildew (Uncinula necator Schw.) and gray mould
(Botrytis cinerea Pers.) are the most ubiquitously damaging disease of grapevines worldwide, reducing yield, vine
growth and fruit quality. The mildew and powdery mildew attack all aerial parts of grapevine plants, while grape gray
mould is frequently encountered on the mature berries, close to harvest. Incidence of the most important vineyard
diseases was investigated in ampelographic collection belonging to Agricultural Sciences and Veterinary Medicine
University (USAMV) from Iaşi (SE Romania) in 2012. Biological material was represented by different grapevine
varieties, both table and wine grapes varieties. The field observations were correlated with yearly phenological and
ecological elements witch lead to prognoses and control of main fungal pathogen. Depending on degree of attack
recorded for each cultivar the resistance or sensibility of analyzed cultivars (by OIV 1983) was established. The grape
varieties taken in study showed different reactions under the same environmental conditions, materialized by different
attack degrees of grapevine mildew, powdery mildew and grape gray mould. The aim of this study was to determine the
presence and distribution of the most important vineyard diseases across the ampelographic collection of USAMV Iaşi
(SE Romania) in 2012.
