The occurrence of powdery mildew of watermelon has significantly increased in recent years. While the majority of the watermelon varieties evaluated in South Carolina were susceptible to powdery mildew, the seedless variety Suprema and seeded variety Declaration were relatively less susceptible and the commercial pollenizers Lion, SP5 and SP6 were resistant across three years of testing. Because of the frequent occurrence of powdery mildew of watermelon in recent years newer resistant cultivars and fungicide sprays will be needed to manage the disease.
Relative susceptibility of commercial watermelon varieties to powdery mildew
By: Chandrasekar S. Kousik, Jennifer L. Ikerd, & Mihir Mandal
U.S. Vegetable Laboratory, USDA, ARS, Charleston, SC, 29414, USA
Received 17 February 2019, Revised 26 July 2019, Accepted 1 August 2019, Available online 3 August 2019.