First, we need a clarification:  

• Dry Bean Rust is NOT related to Asian Soybean Rust
  • Dry Bean Rust is caused by Uromyces appendiculatus
  • Asian Soybean Rust is caused by Phakopsora pachyrhizi

Here is what we know, so far:

• In 2008, Dry Bean Rust increased in northeast North Dakota, and became severe in some areas
  • Our normal resistance gene (Ur3) is not effective against this race of rust
  • 26 varieties have been checked so far, and ALL are susceptible
• Rust can spread quickly under moderate temps and heavy dews
  • Rust spores overwinter locally in dry bean residue
  • If rust comes in early, it can cause severe yield loss (over 40%)
  • When it comes in late, growers usually don't lose yield and it can actually help in dry-down
• Your Dry Bean Rust Management Plan for 2009 should be:
  • Expect the new race of rust to spread to your area
  • Consider your variety susceptible, unless future research indicates differently
  • Scout your fields
  • Spray fungicides, if needed
    • Some need to be applied before infection occurs
    • Some have a LIMITED curative action