Article

Information is provided about the distribution of a powdery mildew fungus species new for Israel, Neoerysiphe cumminsiana (U. Braun) U. Braun (Erysiphales), recorded on Crepis spp. and Phagnalon rupestre (L.) DC. A conclusion is reached about the possibility of discovering this fungus in some countries of southern Europe and in northern and southern Africa. The need is noted for the revision of powdery mildew specimens identified as Erysiphe cichoracearum DC. and collected in these regions on host plants belonging to Asteraceae.