American Wheat Striate Mosaic
Symptoms: White parallel lines found mostly on the underside of the leaf and brown spots on glumes later in the season.
Scouting: Symptoms will start to show in the early spring and continue through harvest.
Treatment: The Painted Leafhopper is the vector; treat by planting late to reduce infection and select reesistant varieties.
Barley Yellow Dwarf
Symptoms: Leaf tips turn yellow to purple and mid keeps a dark green color.
Scouting: First symptoms normally occur during the boot stage, however scouting/controlling vectors (Greenbugs and Bird Cherry-Oat Aphids) is important.
Treatment: Control vectors such as Greenbugs and Bird Cherry-Oat Aphids and select resistant varieties.
Dryland Root Rot
Symptoms: White heads later in the season; the base of the stem and crown will turn a pink to white color.
Scouting: Symptoms typically occur from heading to maturity.
Treatment: Fungicide treatment may or may not work.
High Plains Mosaic
Symptoms: Spotty, yellow streaks at the leaf tips.
Scouting: Symptoms will typically become apparent in early spring to heading.
Treatment: Control wheat curl mites (the vector for High Plains Mosaic) by later planting and control of volunteer wheat before seeding.
KSU & OSU Photos
Symptoms: Orange pustules (sores) on the upper surface of the leaf.
Scouting: Symptoms typically occur in early spring to heading, but may occur in the fall as well.
Treatment: Selecting a resistant variety is most successful; seed treatments have shown fall control, and foliar fungicide applications can be feasible on high yield potential wheat.
KSU & OSU Photos
Symptoms: White cottony blotches on leaves spotted with black dots.
Scouting: Can be found early spring to heading.
Treatment: Not a real problematic disease, resistant variety selection is the best control.
Symptoms: Brown lesions on seedling wheat plants.
Scouting: Symptoms are seen in seedlings in the fall.
Treatment: Later planting can reduce occurrences.
| KSU Photo|
Symptoms: Dark red pustules (sores) found on the stems, leaves and heads.
Scouting: Normally not seen until later in season as it thrives in high temperature conditions.
Treatment: Select resistant varieties; fungicide treatments may be economical in irrigated wheat.
Symptoms: Pustules (sores) found in "stripes" on the leaf surface.
Scouting: Most pronounced symptoms found in early spring.
Treatment: Plant varieties that show resistance; fungicides may be economical in irrigated wheat.
Take-All Root Rot
Symptoms: Stunted plants with white heads; roots will pull up easily and have a black lower stem.
Scouting: Most pronounced symptoms occur at jointing and into heading.
Treatment: Crop rotation or extended fallow period is the best control.
Symptoms: Tan lesions with yellow borders can be found on leaf surfaces.
Scouting: Can be seen most often from jointing to heading.
Treatment: Crop rotation or some tillage activity in continuous wheat.
Wheat Soil-Borne Mosaic
Symptoms: Plants will have a spotted (mosaic) pattern of yellow and green on the leaf surface along with stunted plant growth.
Scouting: Seen mostly in the spring just after "green up."
Treatment: Selection of resistant varieties and later planting to avoid vector infection of virus.
Wheat Spindle Streak Mosaic
Symptoms: Yellow and light green streaks along leaf surface; will not lead to stunted plant growth.
Scouting: Found in early spring after "green up."
Treatment: There are varieties that express moderate resistance to this virus; also avoid early planting.
Wheat Streak Mosaic
Symptoms: Long yellow stripes at leaf tips and plant stunting.
Scouting: Symptoms start occurring in April along field edges.
Treatment: Control volunteer wheat before planting to avoid infection from wheat curl mites; also late planting and resistant variety selection can also be effective.