Bean rustCaused by: Uromyces appendiculatus
Problem Category: Fungal Disease
Symptoms: Initially the symptoms appear as small yellow/white spots on leaves. Later the spots become enlarged and shows raised brick red rust pustules (uredinia). Normally this pustules are surrounded by a yellow halo. Premature leaf drop may occur if the disease is severe.
Comments: Spores (urediniospores) spread from one field to another by air. The black teliospores formed at the end of the crop season overwinter in the field and act as inoculum for next season crops.
Management: Grow available resistant varieties. Remove and destroy the infected crop debris. Follow crop rotation. Keep the field free from weeds. If the disease is severe, spray suitable fungicide.