Prunus × blireana · Shrub
Silver leaf: Prune out infected wood well below the visible symptoms and burn it immediately.
Bacterial canker: Prune out affected wood in dry weather during summer to prevent spread.
Powdery mildew: Improve air circulation by thinning the canopy and apply a suitable fungicide if severe.
Aphids: Encourage natural predators like ladybirds or use a strong jet of water to dislodge them.
Verticillium wilt: Remove and destroy infected plants and avoid replanting Prunus in that soil for years.