flax rust

Flax rust is a disease that affects flax plants, caused by the rust fungus Melampsora lini. Rust diseases, in general, are caused by over 7,000 species of fungi within the phylum Basidiomycota. These diseases typically manifest as powdery pustules in various colors—yellow, orange, red, rust, brown, or black—on plant leaves, young shoots, and fruits. This can lead to reduced plant growth and productivity, and in severe cases, wilting and death.12

Control measures for rust diseases include cultivating resistant plant varieties, maintaining sanitation, and using appropriate fungicides. Flax wilt, a different disease, is caused by the fungus Fusarium lini and affects young seedlings, causing wilting and death in older plants.23