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

Fig. 7. Location of 92 sunflower fields surveyed between 2001 and 2011 with downy mildew incidence greater than 10% as detected by the mid-season survey (triangles) and the late-season survey (circles).



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