S.M. PURUSHOTHAMAN, N. RAMACHANDRAN, VEENA and. “Peronospora Sparsa - a New Disease on Field Grown Roses”. Indian Phytopathology 56, no. 2 (June 10, 2003): 236. Accessed October 20, 2025. https://epubs.icar.org.in/index.php/IPPJ/article/view/18326.