In Canada, research continues on a new rapeseed disease — verticillium stripe

Research continues in Canada regarding a new but already widespread soil disease of rapeseed — Verticillium stripe. This is reported by the Canola Council of Canada. Verticillium stripe, a soil disease caused by Verticillium longisporum, was first discovered in Manitoba, Canada in 2014. Despite increasing incidence, the impact of this disease on rapeseed yield had not been quantified. To address this gap, the relationship between this disease and yield was studied on two rapeseed hybrids, 45H31 and CS2000, on two infected field plots near St. Albert, Alberta, in 2020 and 2021. "In 2020, a year with above-average precipitation, both hybrids developed moderate disease levels, while in 2021, a drought year, infection symptoms and signs were milder. Regression analysis showed that seed yield per plant decreased with increasing Verticillium stripe severity in both years of the study. In both hybrids, the relationship between disease severity and yield was best explained by ...