Salix caprea · Tree
Willow Anthracnose: Rake up and destroy fallen leaves to reduce spore load and prune out severely infected shoots promptly.
Willow Rust: Control is rarely necessary as damage is minimal; remove alternate hosts like Euonymus if feasible to break the cycle.
Willow Canker: Prune out affected branches well below the visible damage during dry weather to prevent spread.
Aphids: Encourage natural predators like ladybirds and lacewings, or wash off infestations with a strong jet of water.
Willow Scale: Prune out heavily infested branches and encourage parasitic wasps which naturally control scale populations.