Occurrence of <i>Ustilago striiformis</i> in <i>Dactylis glomerata</i> Seed Production Fields in Oregon

Fig. 3. Distribution of field with (x) and without (o) Ustilago striiformis in orchardgrass seed production fields in 2004 and 2005.



Image from Plant Health Progress article:
Occurrence of Ustilago striiformis in Dactylis glomerata Seed Production Fields in Oregon