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GrainGenes Pathology Report: Stem Rust

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Pathology
Stem Rust
Other Name
Black Rust
Black Stem Rust
Type
Fungus
Host Species
Triticum aestivum
[ Show all 6 ]
Causal Organism
Puccinia graminis f. sp. tritici
Puccinia graminis f. sp. secalis
Puccinia graminis f. sp. avenae
Trait
Reaction to stem rust (oat)
Evaluation
Reaction to stem rust (oat), 1998 UEOPN
[ Show all 8 ]
Gene Class
Reaction to Puccinia graminis Pers.
Resistance Gene
rpg4 (Hordeum)
[ Show all 21 ]
Resistant Allele
Rpg1 (Hordeum)
Symptoms
Stem rust develops from spores carried on wind currents from regions where the disease persists over winter. Stem rust is favored by warm weather and usually develops late in the season. First appears as oval reddish-brown pustules. All aerial portions of wheat are susceptible, but stem rust pustules occur with greater frequency on leaf sheaths and stems. Stem rust pustules develop on both surfaces of infected leaves and possess very ragged edges compared to leaf rust pustules. Life cycle is completed on common barberry (Berberis vulgaris and B. canadensis). Stem rust also attacks barley, rye and triticale.
Image
Stem rust pustules erupting...
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Reference
ReferenceKephart KD (1993) Winter wheat disease management Insect and plant disease management handbook.
ReferenceHarder DE and Haber S (1992) Oat diseases and pathologic techniques Oat Science and Technology 307-425.
Reference(1987) Compendium of wheat diseases.