Phakopsora pachyrhizi

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Phakopsora pachyrhizi
Phakopsora pachyrhizi 1.jpg
Scientific classification
Kingdom: Fungi
Phylum: Basidiomycota
Class: Urediniomycetes
Subclass: Incertae sedis
Order: Uredinales
Family: Phakopsoraceae
Genus: Phakopsora
Species: P. pachyrhizi
Binomial name
Phakopsora pachyrhizi
Syd. & P. Syd., (1914)
Phakopsora pachyrhizi in US 2006.jpg
Contour map showing numbers of NADP sites testing positive for P. pachyrhizi in center and East of USA in 2006.

Malupa sojae
Malupa vignae
Phakopsora sojae
Phakopsora vignae
Physopella pachyrhizi
Uredo sojae
Uredo vignae
Uromyces sojae

Phakopsora pachyrhizi is a plant pathogen. It causes Asian soybean rust.


The disease froms tan to dark-brown or reddish-brown lesions with one to many prominent, globe-like orifices.[1] Urediniospores form from these pores.[2] Lesions initially are small, turning from gray to tan or brown as they increase in size. The lesions are most abundant on the bottom surface of leaves but can also form on petioles, pods, and stems.

Risk factors[edit]

Uredospores are wind-blown and are produced abundantly on the infected tissue of soybeans or other legume hosts.[1]


The disease is often controlled using the fungicides oxycarboxin, triforine, or triclopyr.[1]


  1. ^ a b c Shanmugasundaram, S.; Yeh, C.C.; Hartman, G.L.; Talekar, N.S. (1991). Vegetable Soybean Research Needs for Production and Quality Improvement (PDF). Taipei: Asian Vegetable Research and Development Center. pp. 86–87. ISBN 9789290580478. Retrieved 6 February 2016. 
  2. ^ Sinclair, James Burton; Backman, P. A. (1989). Compendium of Soybean Diseases (3rd ed.). St Paul, MN: APS Press. ISBN 9780890540930. 

External links[edit]