Association of Bipolaris sorokiniana, Fusarium graminearum Group 2, and F. culmorum on Spring Wheat Differing in Severity of Common Root Rot

Isolation of B. sorokiniana from crowns of the same plants in classes 0, 1, 2, and 3 and from plants with no subcrown internodes did not differ significantly in each of the 3 yr and averaged 76%. Fusarium graminearum group 2 was recovered from 7% of the subcrown internodes and 9% of the crowns, whereas F. culmorum was isolated from 2% of the subcrown internodes and 4% of the crowns