Effect of Previous Crop on Susceptibility of Flax to Rhizoctonia solani

Abstract

Effect of Rhizoctonia solani AG group,previous crop, flax cultivar,and their interactions on the incidence of flax seedling blight were studied under greenhouse conditions in autoclaved soil.All the main effects of AG group,previous crop,and cultivar were highly significant sources of variation in survival. Of the first order interactions, AG group x previous crop was the only significant source of variation. The second order interaction of AG group x previous crop x cultivar was a nonsignificant source of variation. All the previous crops significantly reduced survival within each AG; however,the magnitude of reduction varied from one AG to another. Thus, within AG-2,corn,rice, and cotton reduced survival by 32.42,16.69, and 6.82% respectively, while withinAG-4, con, rice, and cotton reduced survival by 4.68,11.55, and 11.55%, respectively.