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Mycologia, BASIDIOMYCOTINA, UREDINALES, PUCCINIACEAE .

Crops attacked: sugar beet .

Beet rust

Identification, Description, Biology, Epidemiology, Treatement, Possible misleading, Images

[R]Description
All around the Mediterranean area distorsions occur on the petioles, the leaf lamina and in the seed crops in spring.
Slightly discoloured leaf spots appear in autumn and small pustules (aprox. 1 mm) filled with a rust-orange powder form on the upper and lower leaf surface.
The leaves become yellow and die.

[R]Biology
The spring attacks result in the formation of aecidiospores which contaminate the surrounding foliage. This infection causes the occurence of the rust-orange urediniospores.
The late season spores are teliospores through which the parasite is carried over from one year to the next.

[R]Epidemiology
.

[R]Treatement
Avoid excessive use of nitrogen.
No treatment is necessary.

[R]Possible misleading
.

[R] Images

1. Uromyces betae , Rust (PUTZ C., INRA)
   Beet rust Small orange pustules on the upper surface of a beet leaf.
   
2. Uromyces betae , Rust (BONDOUX P., INRA)
   Beet rust Teliospores and uredospores of Uromyces betae , light microscope.
   
3. Uromyces betae , Rust (INRA)
   Beet rust Rust fructifications on a beet leaf.
   
4. Uromyces betae , Rust (BASF)
   Beet rust Orange pustules of rust on the upper surface of a beet leaf.
   

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HYP3 on line : Species (scientific name), Diseases (common names), Glossary, Crops.

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