Barley Barley Crop Icon Brassicas Brassicas Crop Icon Sugar Beet Sugar Beet Carrots Carrots Icon Leeks Leek Icon Maize Maize Icon Oilseed Oilseed Icon Onions Onions Icon Other Cereals Other Cereals Icon O R T Peas And Beans Peas and beans Icon Potatoes Potatoes Icon Salad Crops Salad Crops Icon Soft Fruits Crops Soft Fruits Icon Top Fruits Crops Top Fruits Icon Wheat Crops Wheat Icon Calendar Calendar icon Arrow Next Arrow Previous Close Checkmark

Crown Rust

Close up & Crown rust of oats (Photo G. Bubb)

Pathogen

Fungus

Hosts

Oats, grasses especially perennial rye-grass.

Symptoms

First signs are small rounded orange-yellow coloured pustules, usually on both sides of the leaves. Later the pustules join together to form evenly affected areas. Small black pustules are produced late in the season.

Development

Infection comes from windborne spores arising from volunteer host plants.

Favourable Factors

20C temperature with high humidity favours the disease.

Importance

Crown rust is host specific to oats (and some grasses). Because of the need for great warmth the disease occurs only shortly before harvest but it can cause large reduction in yield and quality.

Control

Identification and Management of cereal diseases

Find out more information on the key disease threats to your cereal 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.

View now

Keep up to date with the latest from Bayer Crop Science

Sign up to our newsletter