and P.D. TYAGI, P.N. SHARMA, A.S. KAPOOR. “Kala Zira - a New Host Record of Erysiphe Heraclei”. Indian Phytopathology, vol. 45, no. 4, Jan. 2002, pp. 472-5, https://epubs.icar.org.in/index.php/IPPJ/article/view/21797.