Asian Soybean Rust

Background

Asian soybean rust ( Phakopsora pachyrhizi ) was found for the first time in the United States in Louisiana. While doing a routine inspection of a soybean production field at the LSU AgCenter’s Ben Hur Research Farm, Dr. Ray Schneider, plant pathologist, found what he suspected as Asian soybean rust.

Rust Response plan

The purpose of this plan is to outline actions for the pre- and post-confirmation of the establishment of Asian soybean rust (Phakopsora pachyrhizi) in the United States and Louisiana.

Asian Soybean Rust Hosts

Provides a list of plant hosts for Asian Soybean Rust.

Identification of Asian Soybean Rust

Symptoms of soybean rust appear identical regardless if they are caused by Phakopsora pachyrhizi or Phakopsora meibomiae. Host plants infected with soybean rust first exhibit small lesions that gradually increase in size and turn from gray to tan or brown. They become polygonally shaped restricted by leaf veins, and may eventually reach 2 to 3 square millimeters.

Brazilian Soybean Rust Expert Says Check Fields Often; Hurricane Could Blow In More Disease Spores

The trouble with Asian soybean rust, the disease most feared by soybean farmers, is that the spores that cause it can blow into a field from anywhere, anytime. And Hurricane Dennis could bring in a new wave from South America.

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