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Wheat leaf rust - Wikipedia, the free encyclopedia

Wheat leaf rust

From Wikipedia, the free encyclopedia

Wikipedia:How to read a taxobox
How to read a taxobox
Puccinia triticina
Symptons of wheat leaf rust
Symptons of wheat leaf rust
Scientific classification
Kingdom: Fungi
Phylum: Basidiomycota
Class: Urediniomycetes
Order: Uredinales
Family: Pucciniaceae
Genus: Puccinia
Species: P. triticina
Binomial name
Puccinia triticina
Erikss. 1899
Synonyms

Puccinia dispersa f. sp. tritici Erikss. & E. Henn. 1894
Puccinia recondita f. sp. tritici (Eriks. & E. Henn.) D.M. Henderson

Wheat leaf rust is a serious fungal disease affecting wheat caused by Puccinia triticina. It is the most prevalent of all the wheat rust dieases, occurring in nearly all areas where wheat is grown. It has caused serious epidemics in North America, Mexico and South America.

It is most destructive on winter wheat, probably because this allows the pathogen to overwinter. Infections can lead to a 1-20% yield loss due to the fact that infected leaves die earlier and all the nutrients are directed to the growing fungi. Infection can also cause grain to shrivel.

The pathogen has an asexual and sexual cycle. In North America, South America and Australia the pathogen only undergoes it's asexual cycle. However this does not seem to be a disadvantage to it, and wheat lead rust has many races with different virulence. The sexual lifecycle of wheat leaf rust requires a different host species, Thalictrumn spp.

Wheat Stem Rust spreads via air bourne spores. The germination process requires moisture, and works best at 100% humidity. Optimum temperature for germination is between 15-20 C. Before sporulation, wheat plants appear completely asymptomatic. This is because rust pathogens are biotrophic and require living plant cells to survive.


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