SACHAN SN. Phenological spectrum and perennation of powdery mildew fungi of Doon Valley-I-Erysiphe. Indian Phytopath. [Internet]. 2002 Jan. 12 [cited 2025 Nov. 3];44(1):121-3. Available from: http://epubs.icar.org.in/index.php/IPPJ/article/view/21837