PJB-1986-41
EFFECT OF INOCULUM DENSITY OF DRECHSLERA SOROKINIANA AND FUSARIUM AVENACEUM ON THE INCIDENCE OF WHEAT ROOT ROT IN OKLAHOMA
C. IKECHUKWU
UMECHURUBA AND L.L. SINGLETON
Abstract
Inoculum density of Drechslera sorokiniana and
Fusarium avenaceum on the incidence of wheat root rot disease on hard red winter wheat (Triticum aestivum) cv. ‘’Danne’’ were evaluated in the glass house. Percentage recovery of D. sorokiniana from subcrown internode ranged from 48-97% as the inoculum density increased from 1 to 1000 conidia per g of soil and plateaued between 250 t0 1000 conidia per g of soil. Percentage recovery of F. avenaceum from subcrown internodes ranged from 41-57% as inoculum density increased from 1 to 1000 macroconidia per g of soil, plateaued between
100 and 500 macroconidia per g of soil , and finally declined to 45% at 100 macroconidia per g of soil. Disease severity rating of the subcrown internodes based on percentage lesions covering the surface areas of the internodes followed similar trend for each of the pathogens.
To Cite this article:
Download
