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Pod and Stem Blight (Phomopsis Seed Rot)

Phomopsis (Pod & Stem Blight) species are frequently isolated from premature, dying plants after mid-August. Typical symptoms are bright yellow leaves on the top of the plant followed by death of tissues from the top down. This fungi can be seedborne. Seeds infested with Phomopsis may be cracked and shriveled and usually have a low germination rate. If these seeds are used, they may result in low emergence or seedling blight. It is recommended to do seed testing if seeds are to be saved from fields where pod and stem blight was severe this year.

Resources

Phomopsis Seed Rot
By Ohio State University Extension

Pod & Stem Blight
By Oklahoma State University Extension

Phomopsis Infected Seed
By Iowa State University  - Integrated Crop Management - WEB site