S. N. SACHAN, “Phenological spectrum and perennation of powdery mildew fungi of Doon Valley-I-Erysiphe”, Indian Phytopath., vol. 44, no. 1, pp. 121–123, Jan. 2002, Accessed: Jun. 05, 2026. [Online]. Available: https://epubs.icar.org.in/index.php/IPPJ/article/view/21837