The incidence of crown rot in wheat, barley and triticale when sown on two dates

Abstract

Thirteen bread wheat cultivars, a durum wheat, a barley and a triticale cultivar were assessed in the field for their reaction to crown rot ( Fusarium graminearum Group 1), based on the incidence of basal browning. Plots were sown in May and again in July at 2 sites i n northern New South Wales where the incidence of crown rot was high in the previous year. The incidence of infected plants and the incidence of plants with basal browning tended to be higher in all cultivars when sown in May. There was a mean loss in potential yield at 1 site of 35% and 18% at the other site. However, the mean loss in potential yield was unaffected by sowing date.