Uncinula is a genus of fungi. Its species are plant pathogens that cause powdery mildew diseases on various plant hosts. The genus is characterized by its dark chasmothecia which bear filamentous, hyaline appendages with hooked tips. Over one hundred species have been described from mostly dicotyledenous hosts. Braun and Takamatsu (2000) suggested that Uncinula should be considered a later synonym of Erysiphe ; not all subsequent researchers have accepted their conclusions.
Drepana uncinula, the spiny hook-tip, is a moth in the family Drepanidae. It is part of the Drepana subgenus Watsonalla. It is found in France, Spain, Portugal, Italy and the western and southern part of the Balkan Peninsula. It was first described by Moritz Balthasar Borkhausen in 1790.