Flax rust

Rounded orange-yellow pustules develop on seedlings about mid-season. In summer, orange pustules develop on the leaves. In late summer, brown to black pustules develop on the leaves; on stems they are elongated and purplish black. Bolls break off or fail to develop.

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Presence among species

AgentsSusceptible host
Melampsora liniLinum usitatissimum (Pythozome V13)