Toxic Seed Piece Syndrome (TSPS) or “IWW” Symptoms
Image 1. Translucent seed piece. No smell is associated with TSPS seed.
Image 2. A close-up of the leaves showing the interveinal discoloration.
Images: Phil Hamm and Jordan Eggers, Oregon State University Hermiston Agricultural Research and Extension Center
June 28, 2012
Image 3. Underside symptoms of leaf with interveinal bronzing.
Images: Phil Hamm and Jordan Eggers, Oregon State University Hermiston Agricultural Research and Extension Center
June 28, 2012
Image 4. Symptomatic plant showing an upright growth pattern. Notice how
easily the plant is seen due to the off color of the plant.
Image 5. Vascular discoloration in the stem just above where the seed piece
was attached to the stem (arrow).
Images: Phil Hamm and Jordan Eggers, Oregon State University Hermiston Agricultural Research and Extension Center
June 28, 2012