Rust
Symptom
Lesions typically from first on older leaves, and then spread to younger leaves. Symptom begin as small flecks and then reddish airborne spores are produced copiously within the lesions on the leaves. Later in the growing season, the lesions may appear dark because black survival spores develop within the pustules. Severely affected leaves can be completely covered with pustules, turn chlorotic (yellow) and then dry out and die, bulb size and quality are also reduced.
