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

Fig. 2. Frequency of occurrence of plants per meter row length infected with Ustilago striiformis in 16 Dactylis glomerata seed production fields in 2004 and 2005. Field numbers correspond to those in Table 2.



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