ampelopsidis was found on Parthenocissus spp. Burr., E. tuckeri Berk., U. americana Howe and U. spiralis Berk. It is a common pathogen of Vitis species, including the wine grape, Vitis vinifera.The fungus is believed to have originated in North America. Fungus Uncinula necator ... Photo (Albury Organic Vineyard): Powdery mildew life-cycle. To manage powdery mildew, several cultural practices should be conducted. Erysiphe (uncinula) necator was not detected in air samples collected during vine dormancy. Some grape varieties are less susceptible to fungus than others. Uncinula americana Howe [telem.] Uncinula necator Schwein [telem.] Proteomes - Uncinula necator (Grape powdery mildew) ))) All None. Erysiphe necator var. Initially, Uncinula necator was localized and endemic only to eastern and central North America. Powdery mildew (Uncinula necator) is the most widespread and destructive disease of grapevines worldwide, and is the main target of fungicides used on Vitis vinifera. Its young tissues possess little inherent resistance to the pathogen. originally named Uncinula necator, now renamed Erysiphe necator. In contrast, Vitis vinifera evolved in isolation from the pathogen. Infection and subsequent disease development is influenced by many factors including the presence of infected grapevine tissue, spores, and the occurrence of particular weather conditions. Being sympatric, indigenous Vitis species evolved partial resistance. Overview. Disease management. Overview; Components; Publications; Map to UniProtKB (6,482) Unreviewed (6,482) TrEMBL. Erysiphe necator) is a fungus that causes powdery mildew of grape. Uncinula necator (Schw.) In general, the native American varieties are less susceptible than Vitis vinifera and its hybrids. Uncinula necator (Schw.) [syn. Uncinula necator (syn. 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