High plains disease (wheat)
Area of impact: Leaf
Description: Causes severe stunting yellowing and a mosaic pattern on leaves. As the disease advances marginal reddening and scalding occurs.
Pathogen involved: Virus
Timing/Conditions: Spread by the wheat curl mite; a round cream-colored wingless insect that depends on wind for movement.
Contributing factors: Proximity to corn barley, foxtail and other grasses that can harbor the mite.
Management practices: Plant resistant varieties. Plant winter wheat late and spring wheat early when mites are less active. Control volunteer grasses that may host the mite or disease.