Brown Rust

Puccinia triticina is specific to wheat. Other pathotypes can affect barley, rye and triticale. 

Biology and occurrence

Brown rust (Puccinia triticina) is a foliar pathogen of wheat and initiates disease by many cycles of airborne uredospores, particularly in the spring. It is favoured by warmer conditions compared to yellow rust and tends to develop later in the summer than yellow rust, during warm, humid spells of weather.

The disease is more prevalent in the south and east of England due to the relatively warm and dry conditions. Mild winters and dry springs favour severe epidemics as more spores are produced and dispersed, particularly because dry conditions in spring are usually associated with dew at night, which allows infection.

Life cycle of brown rust (Puccinia triticina) adapted from the Encyclopaedia of Cereal Diseases.

Symptoms

Brown rust can be seen in th autumn months on early sown crops, the disease is identifiable by orange/brown pustules. During the later months brown rust develops in a random formation which is digusinshable from yellow rust which develops in stripes. Whilst most commonly seen on the leaves brown rust can also be found on the stems and glumes of the plant. 

Management recommendations

Varietal resistance offers an effective method to manage the disease. Use the AHDB Recommended List – scroll to page 10 and 11 to check the current resistance rating of varieties (this has a 1-9 scale, where 9 represents good resistance and 1 represents extreme susceptibility). Compared to yellow rust, there are fewer varieties available with good resistance (8 or 9) to brown rust. In addition, current news on development of new races of brown rust in regions of the UK can be seen using the AHDB UKCPVS site at: https://ahdb.org.uk/ukcpvs

Monitor all crops regularly for rust symptoms focusing on early-sown crops in high-risk regions.

Resistance ratings do not guarantee durability of resistance. New brown rust races can appear, so check all varieties for brown rust lesions.

Diversifying varieties can help reduce the risk of disease spread between varieties.

Start your disease management in high-risk crops with early spring foliar fungicides.

Available fungicides include: azoles (DMIs; e.g. prothioconazole), SDHIs (e.g. bixafen), strobilurins (e.g. pyraclostrobin) and spiroketalmines (e.g. spiroxamine) fungicides, used in mixtures, to protect crops from brown rust. Information on current fungicide efficacy is available from the AHDB – see pages 9-10 in this Fungicide Resistance Guide.

Related links

 

Information and images from Rothamsted's Croprotect webpage supported by BBSRC NERC Sustainable Agriculture Research & Innovation Club

Related Organisations

Content below is from across the PEP community and is not necessarily endorsed by Stewards or by PEP

Connected Content

Diseases infect susceptible plant hosts, where environmental conditions favor disease development. Infected crops achieve lower yields and the quality of the produce can also be affected.

Yellow rust is an important economic disease of wheat. Often occurring more in the east of the UK and areas with mild winters and cool, damp summer weather. A good selection of resistant varieties and well-timed chemical applications can provide effective control of the disease and minimise losses.

Barley is the fourth most important cereal crop in the world, grown in more than 100 countries and used for animal feed, human food and the production of alcohol.

Guide published by BASF and AHDB, written with ADAS & Rothamsted, providing a complete reference book for cereal diseases. 

Wheat is the mostly wide grown crop in the UK. Nationally yields average around 8 t/ha/

This Topic doesn't yet have a Stewarded summary, but connected groups, content and organisations show below. Click the 'Ask to Join' button if you would like to be a Steward for this Topic and provide a summary of current knowledge and recommend useful resources, organisations, networks and projects. "Like" this Topic if you would like to see it prioritised for providing a wikipedia style summary.

Ramularia (Ramularia collo-cygni) is a disease that affects only winter and spring barley. 

Net blotch of barley (causal pathogens: Pyrenophora teres f. sp. teres (Net form); P. teres f.sp. maculata (spot form). Net blotch affects a wide range of grasses, however, the forms on barley are specific to that crop and do not affect other crops. 

Write whatever you want here - this is the main section. You can add links, add pictures and embed videos. To paste text from elsewhere use CTRL+Shift+V to paste without formatting. Add videos by selecting 'Full HTML' below, copying the 'embed html' from the source page (eg Youtube), clicking 'Source' above and pasting where you want the video to appear.
You can upload an image here. It can be jpg, jpeg, gif or png format.
Upload requirements

You can upload a file here, such as a pdf report, or MS Office documents, Excel spreadsheet or Powerpoint Slides.

Upload requirements
Authors Order
Add Authors here - you can only add them if they already exist on PEP. Just start writing their name then select to add it. To add multiple authors click the 'Add another item' button below.