Salix fargesii · Shrub
Aphids: Squash by hand or spray with a strong jet of water; use insecticidal soap if infestation is severe.
Powdery mildew: Improve air circulation and prune out affected shoots; apply a fungicide if necessary.
Slugs and snails: Use physical barriers like copper tape or apply iron phosphate-based slug pellets at night.
Vine weevil: Apply systemic insecticide drench or use nematodes to control larvae in the soil.
Leaf spot: Remove affected leaves and avoid overhead watering to keep foliage dry.