Salix eleagnos · Shrub
Willow aphid: Encourage natural predators like ladybirds or use a strong jet of water to dislodge them.
Powdery mildew: Improve air circulation and prune out affected branches; apply fungicide if severe.
Willow caterpillar moth: Usually harmless in one-off occurrences; prune out nests if infestation is heavy.
Slugs and snails: Use beer traps, copper tape barriers, or iron phosphate-based pellets.
Vine weevil: Apply nematodes to the soil in autumn or use systemic insecticides for potted plants.