BLUEBERRY LEAF RUST

Blueberry Leaf Rust

(Naohidemyces vaccinia)
Symptoms: Appear in late summer. Brown spots on the upper surface of leaves. Powdery orange-yellow pustules on the underside of leaves. May caused early defoliation.
Disease cycle: In northern climates, Blueberry leaf rust uses hemlock as its alternative host. With the Fraser Valley’s warm climate, the disease might not need hemlock to complete its life cycle.