Broad bean rust

Editorial diagnosis

Diagnosis overview

Bean rust is a rust disease of beans with rust-brown pustules.

In gardens, Broad bean rust can occur on plants including broad bean, Common bean. In the available profiles, it is linked mainly with Legumes.

Its importance depends on how quickly it spreads and whether seedlings, shoot tips, flowers, or fruit are affected. Conditions that favour it include Wet weather or prolonged leaf wetness, Dense planting and poor airflow, Susceptible cultivars. It is serious when heavy foliage loss occurs early.

Compare upper and lower leaf surfaces, the boundary between healthy and damaged tissue, and spread after wet weather. Coatings, spores, or progressive rot support a disease diagnosis.

A common mistake is to identify a disease from one spot alone; weather, spread, and pathogen structures also need to fit.