Pinus contorta · Tree
Pine shoot moth: Prune out affected shoots in autumn and apply insecticide if infestations are severe.
Honey fungus: Improve drainage and avoid planting in soil previously infected with honey fungus.
Needle cast: Ensure good air circulation and remove fallen debris to reduce fungal spores.
Conifer aphids: Wash off with a strong jet of water or treat with horticultural oil in spring.
Pine sawflies: Hand-pick larvae or apply biological controls like Bacillus thuringiensis.