Mildew can spread between barley varieties that are susceptible to the same race of the pathogen.
The risk of severe and widespread infection may be reduced by:
Growing varieties with good resistance to mildew (as indicated by high resistance ratings on the HGCA Recommended List)
Diversifying the varieties grown on a farm so that they are not all susceptible to the same race of mildew. This is achieved by using the Variety Diversification Scheme.
Select a first-choice variety and find its Diversification Group (DG).
Click on the DG group to see the risk of mildew spreading with other groups.
Read across the table to find the risk of spread of mildew for each companion DG.
Wherever possible choose combinations of varieties marked 'low'.
Spring |
Spring |
Spring |
Winter |
Spring |
Winter |
| Concerto |
Doyen |
Cocktail |
Boost |
Oxbridge |
Carat |
Cropton |
Saffron |
Cassata |
|||
| Decanter |
Sequel |
Colibri |
|||
Garner |
Flagon |
||||
| NFC Tipple |
KWS Cassia |
||||
Propino |
Pearl |
||||
Publican |
Purdy |
||||
Quench |
Retriever |
||||
| Scout |
Suzuka |
||||
Sweeney |
Volume |
||||
Waggon |
Winsome |
||||
| Westminster |
Spring |
||||
Forensic |
|||||
| |
Optic |
|
|
DG3 | |||||
|
DG1 |
Low |
Low |
Low |
Low |
Low |
Low |
| DG3 | Low | High | Med | Med | Med | High |
|
DG4 |
Low |
Med |
High |
Med |
Med |
High |
|
DG10 |
Low |
Med |
Med |
High |
Med |
High |
|
DG14 |
Low |
Med |
Med |
Med |
High |
High |
|
DG0 |
Low |
High |
High |
High |
High |
High |
|
Low |
Low risk of mildew spreading between the varieties |
| Med | Medium risk of mildew spreading between the varieties |
|
High |
High risk of mildew spreading between the varieties |
The mildew diversification scheme is operated by the UK Cereal Pathogen Virulence Survey (UKCPVS) which is funded by Defra and
HGCA.