Powdery mildew fungi caused heavy losses to several plants of economic importance. Therefore, a study on powdery mildews of some plants of Asteraceae and Rosaceae was carried out in different areas of Kashmir Himalayas.It was observed that in case of plants of Asteraceae the incidence of infection was high in Hilianthus annuus, Zinnia elegans and Xanthium strumarium whereas moderate to mild infection was observed in other plants of the family Asteraceae. In Rosaceae, the Rosa domescena, Rosa brunonii and Rosa macrophylla showed moderate disease occurrence whereas other plants showed mild infection. However some plants such as Malus domestica showed mild infection or resistance against the powdery mildew disease. It was further revealed that the plants of both Asteraceae and Rosaceae were found infected with Erysiphe cichoracearum and Sphaerotheca fuliginea. The fungi were identified on the basis of anamorph and teleomorph characteristics.
