First report of Stemphylium leaf spot of sugar beet caused by Stemphylium vesicarium in eastern North Dakota, USA
In August 2022 and September 2024, sugar beet (Beta vulgaris L.) leaves with several moderately large, light tan to brown, oblong to irregular leaf spots were collected from fields in Pembina, Grand Forks, and Walsh counties in North Dakota. Leaf spots bordered by 1-2 mm healthy tissue were excised and incubated in h...