Salix acutifolia · Shrub
Willow anthracnose: Improve air circulation by thinning the canopy and remove fallen leaves to reduce spores.
Aphids: Encourage natural predators like ladybirds or use a strong jet of water to dislodge them.
Willow scale: Prune out heavily infested branches in winter or apply horticultural oil during dormancy.
Canker: Cut back to healthy wood with clean tools and avoid wounding stems during pruning.
Sawflies: Hand-pick larvae or apply insecticidal soap if infestations are severe.