Labo, A. . U., and A. A. K. Gufran Ahmad. “INCIDENCE OF POWDERY MILDEW ON CUCURBIT PLANTS IN KATSINA, NIGERIA”. Journal of Phytology, vol. 11, no. 1, Jan. 2019, pp. 05-09, doi:10.25081/jp.2019.v11.3829.