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Phomopsis seed decay is most commonly found when growers use highly susceptible varieties and warm, wet conditions arise in the late season. When these two factors are combined with the pathogen, disease presence may be severe. Severely diseased seeds appear moldy and may be graded lower, which leads to dockage at the elevator. This fact sheet outlines the nature of the causal agent, what signs and symptoms to look for in the field, and how the disease cycle can be interrupted to effectively manage this disease and reduce yield loss.
Symptoms of Phomopsis seed rot. Note the chalky white appearance of severely infected seed.