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Causal organism - Barley yellow dwarf virus
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The disease affects all cereals and grasses. Barley and oats are usually more severely affected than wheat.
The initial symptoms of BYDV infection are normally seen as individual plants scattered through the crop with bright yellow upper leaves. Later, as infection spreads, larger areas of the crop become infected and affected plants can be yellow or reddish in appearance. BYDV is most damaging to plants infected in the early growth stages. The effects of BYDV may be exacerbated by other stress factors, including adverse weather conditions, soil acidity and other pests and diseases.
