Rust - Beans
Severe disease pressure & close up of rust
Severe disease pressure & close up of rust
Fungus
Field and broad beans.
Brown/black pustules of rust with chlorotic halos are typically found on leaves.
The trash-borne fungus can infect autumn sown bean crops or can survive throughout the winter on old bean straw and infect spring sown crops. The characteristic brown / black pustules produce wind-blown spores, which then spread the disease throughout the surrounding and neighbouring crops.
Favourable Factors
Warm, dry weather and low potassium soils.
The disease usually develops too late to seriously affect the yield of winter bean crops, but can occasionally damage and reduce the yield of spring crops.
Find out more information on the key disease threats to your pea and bean crop. For each disease you will find out the importance of the disease in terms of potential yield penalty, how to identify the disease in its early stages and our advice on the best control strategies.