Summary
This study investigated the effects of three row-spacings (10, 20, and 30 cm), three seeding rates (54, 108, and 161 kg/ha-1 for barley and 67, 134, and 202 kg/ha-1 for wheat), and three rates of seed-placed phosphorus (0, 8, and 16 kg/ka-1) in spring wheat (Katepawa, Laura) and spring barley (Manley and Harrington).
Root rot severity was lower on wheat than on barley. There was no relationship between root rot severity and barley yield.
Higher seeding rates decreased root rot severity and the incidence of Fusarium in wheat but not in barley.
Higher rates of phosphorus fertilizer reduced root rot severity in barley and the frequency of take-all in wheat.
Wider row spacing reduced root rot disease severity and frequency of take-all in wheat.
The cultural practices that had the greatest impact on rot diseases caused by take-all were fertilizer rate and row spacing.
