The rust of linseed and flax can be completely controlled by spray of

The rust of linseed and flax can be completely controlled by a spray of Borax.
Melampsora lini, while of economic importance as the causal agent of rust disease of flax and linseed.
Borax can remove rust from outdoor furniture, household appliances, garden equipment, metal surfaces, and more. Mixed with warm water and lemon juice, Borax becomes a paste. Leave the paste on for at least 20 minutes, then wipe off the rust.