9ac1836f_Pests___Diseases__Problem_Symptom
[Cause] Rust, a fungus disease that spreads in moist air and moderate temperatures. The problem is most severe in the Pacific Northwest, where the climate is cool and humid. [Solution] Remove and destroy all infected leaves, including those on the ground. Avoid overhead watering because the fungus spreads in water. Rust prefers plants growing in hot, dry, nutrient-deficient soils, and is not common in the Olympia area. [Problem/Symptom] 
An orange, powdery substance appears on the undersides of the leaves. Eventually, yellow or brown spots appear on upper leaf surfaces. Infected leaves may wilt or curl.
Pests & Diseases
Problem/Symptom