Sorbus commixta · Tree
Fireblight: Prune out infected wood well below the visible symptoms during dry weather, disinfecting tools between cuts.
Apple canker: Cut out cankers with a sharp knife to healthy tissue and apply wound paint to prevent reinfection.
Aphids: Encourage natural predators like ladybirds or use a strong jet of water to dislodge them.
Pear blister mite: Apply an oil-based spray in late winter before bud burst to smother overwintering eggs.
Honey fungus: Improve drainage and avoid wounding roots; severe cases may require removal to prevent spread.