Grapevine (Vitis vinifera L.) is one of the economically most important cultivated plants of the world and is susceptible to many fungal diseases, but highly destructive are downy mildew (Plasmopara viticola), powdery mildew (Uncinula necator), and gray mould (Botrytis cinerea). The knowledge of spreading possibilities of grapevine fungal pathogen and their evolution in vineyards constitute a major objective for plant protection. Incidence of the most important vineyard diseases (powdery mildew, downy mildew and gray mold) was investigated in ampelographic collection belonging to Agricultural Sciences and Veterinary Medicine University (USAMV) from Iaşi (SE Romania) during 2010 and 2011. 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 (powdery mildew, downy mildew and gray mold) across the ampelographic collection of USAMV Iaşi (SE Romania) during 2010 and 2011.

Vitis spp.; fungal diseases; fungal pathogens

Presentation: oral