Influence of Cultural Practices on Incidence of Common Rootrot in Wheat in Saskatchewan

Abstract

Mouldboard ploughing of stubble land in preparation for a second consecutive wheat crop was compared with surface tillage for effect on common rootrot and yield in a study at the Experimental Farm, Swift Current, Sask., during the years 1951–58. Ploughing was found to be effective in reducing the incidence of rootrot in the seedling stage. As the season advanced increasing numbers of plants became infected and by maturity of the crop differences between ploughing and surface tillage frequently had disappeared. In general, yields were not significantly increased by ploughing.

Effect of plant age on temporal progression of common root-rot (Cochliobolus sativus) lesions on subcrown internodes of wheat and barley

“…Various field studies showing a consistent increase in the percentage of diseased plants with time also suggest occurrence of new infections in plants of all ages during the entire growing season (Ledingham, 1961;Ledingham et al, 1960;Verma et al, 1974;Verma et al, 1975b).…”

“…) (Harding, 1972) is a typical simple interest disease, meaning that throughout the season plants are infected from the same source of inoculum (Verma et al, 1974). An increase in the percentage of diseased plants with time also suggests the occurrence of new infections in all ages of plants (Butler, 1961;Ledingham, 1961;Ledingham et al, 1960;Verma, 1973;Verma et al, 1974, Verma et al, 1975b. Except for a report by Broadfoot (Broadfoot, 1933), there is little information on the effect of plant age on the development of common root rot.…”

Managing Crop Disease through Cultural Practices

“…However, some workers consider that burning has limited utility for plant disease control, since elevated soil temperatures are unlikely to be uniformly intense enough at the soil surface and throughout the upper soil profi le where pathogen survival structures are found (Felton et al, 1987). Thus, burning crop residue in Saskatchewan was shown to increase the incidence of plants infected with the common root rot pathogen, Cochliobolus sativus (Ledingham et al, 1960) and although burning wheat residue in Brazil reduced the population of C. sativus, disease severity was not reduced (Reis & Abrao, 1983;Reis et al, 1990).…”

Influence of Crop Residue and Fertilizers on Stand, Yield, and Root Rot of Barley in Southern Alberta

“…) Drechs. ex Dastur) in wheat was increased by the presence of surface crop residue (Ledingham et al 1960) and in barley by the addition of ammonium nitrate (Piening et at. 1969) but its severity in spring wheat on the Canadian prakies was similar whether the crop was grown on fallow or on stubble (Sallans 1958).…”