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Soybean Rust

Scientific Name

Phakopsora pachyrhizi, Phakopsora meibomiae (CABI)

Common Name

Soybean rust

Native To

P. pachyrhizi first appeared in Asia (Schnepf 2005); P. meibomiae is native to South and Central America and the Caribbean (Frederick et al. 2002)

Date of U.S. Introduction

P. pachyrhizi was first discovered in Hawaii in 1994, and in the continental U.S. in 2004; P. meibomiae was discovered in Puerto Rico in 1976 (Bonde et al. 2006)

Means of Introduction

P. pachyrhizi is thought to have been carried by wind to the U.S. from South America during the 2004 hurricane season (Schnepf 2005)


Disease of soybean and other legumes; P. pachyrhizi can reduce soybean yields up to 80% (Schnepf 2005); P. meibomiae is less virulent but has a broader host range (CABI)

Soybean rust -
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Soybean rust damage that appears on upper leaves of soybean plants when advanced.


Reid Frederick USDA, Agricultural Research Service

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Distribution / Maps / Survey Status


Selected Resources

The section below contains highly relevant resources for this species, organized by source.

Federal Government
International Government
State and Local Government