Prevalence and Incidence of Sunflower Downy Mildew in North Dakota Between 2001 and 2011

Fig. 5. Prevalence of sunflower fields with downy mildew as detected by mid-season and late-season surveys and total rainfall between 15 May and 15 June from 2001 to 2011.



Image from Plant Health Progress article:
Prevalence and Incidence of Sunflower Downy Mildew in North Dakota Between 2001 and 2011