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Barley Yellow Dwarf/Red Leaf Symptoms
Barley yellow dwarf symptoms in small grains are fairly common every year, but usually aren't severe unless a late planting of a wheat, barley or oat crop coincides with an influx of a high populations of cereal aphids that are carrying the barley yellow dwarf virus. Random patches of stunted, yellowing plants ranging from one or a few plants up to fairly large areas can be seen in spring wheat fields as well as barley. Similarly, this disease causes a red to bronze leaf symptom in oats.
Damage from this virus disease depends on time of infection, number or proportion of infected plants, and degree of symptom expression. Early season infection can lead to significant stunting and leaf discoloration. Late infection often is seen only as discoloration of the upper leaves. Adverse growing conditions can aggravate symptoms and ultimately increase yield loss.
Barley yellow dwarf/oat red leaf is a virus disease transmitted by cereal aphids. An early influx from states to our south of aphids carrying the virus could mean more damage from this disease.
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