wheat rust

from WordNet (r) 3.0 (2006)

wheat rust
    n 1: rust fungus that attacks wheat [syn: {wheat rust},
         {Puccinia graminis}]

from The Collaborative International Dictionary of English v.0.48

Wheat rust \Wheat rust\
   A disease of wheat and other grasses caused by the rust
   fungus {Puccinia graminis}; also, the fungus itself.
   [Webster 1913 Suppl.]