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GrainGenes Pathology Report: Wheat Spindle Streak Mosaic

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Pathology
Wheat Spindle Streak Mosaic
Other Name
Wheat Yellow Mosaic
WYMV
WSSMV
Type
Virus
Host Species
Triticum aestivum
Hordeum vulgare
Secale cereale
Vector
Polymyxa graminis
Trait
Reaction to Wheat Spindle Streak Mosaic
Evaluation
Wheat spindle streak virus resistance, Khan00
Symptoms
Caused by a virus transmitted by Polymyxa graminis (Led.), a common soilborne fungus that attacks wheat roots during cool, wet periods of the fall and early spring. Wheat yellow mosaic usually develops more uniformly over an entire field than soilborne mosaic. Symptoms vary from light green-to-yellow dashes to a bright yellow mottling of the leaves. Dashes and streaks run parallel to leaf veins and taper at both ends to form 'spindles'. Symptoms from fall infections are most prominent in early spring when temperatures are ideal (48 to 55 F) for disease development. Disease progression is halted and symptoms often disappear at temperatures warmer than 65 F. Vector and virus are spread by any means of dispersing soil from infested fields.
Image
The soil inhabiting fungus, Polymyxa graminis,...
Leaf symptoms of wheat spindle streak mosaic,...
Reference
ReferenceKephart KD (1993) Winter wheat disease management Insect and plant disease management handbook.
Reference(1987) Compendium of wheat diseases.