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Characteristics of Rust Diseases Affecting Small Grains

Disease Pustule Location Pustule Appearance Host Infected Host Specificity
Stripe rust Leaf, sheath, spike Yellow orange, form stripes Wheat, barley Different strain on each grain
 
Leaf rust Leaf, sheath Reddish orange, oval, small Wheat, barley One sp. on barley; separate sp. on wheat, rye, triticale
 
Stem rust Stem, leaf sheath Brick red, large, elongated, tattered edges Wheat, barley, oats One f. sp. on wheat, barley; separate f. sp. on oats
 
Crown rust Leaf, sheath stem Reddish orange, oblong, smaller than stem rust Oats
 

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