Wheat streak mosaic

Area of impact: Leaf

Description: Short light green or yellow streaks that run parallel with leaf veins. Symptoms can show as early as green-up in the spring. Plants may be stunted and thin throughout the season.

Pathogen involved: Virus transmitted by the soil fungus Polymyxa graminis.

Timing/Conditions: Infection starts in fall winter or early spring and prefers wet soils.

Contributing factors: Occurs wherever fungus occurs in the soil.

Management practices: Fungicides will not control the virus. Plant resistant varieties and delay planting.

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