Foliar fungicide activity and seed treatment options for barley

This information will help you match fungicides to the primary disease risk(s) in barley. Use it alongside our fungicide performance results and resistance management guidance to help maintain control within and across seasons.
Foliar fungicide activity and seed treatment options for barley (xls) Fungicide performance for wheat, barley and oilseed rape The Fungicide Resistance Action Group (FRAG-UK)

Fungicide activity rating for major barley diseases

Updated April 2020

Control level

  • 4 = Highest
  • 1 = Lowest
  • - = Insufficient data (check label for information on activity)
Chemical group Active ingredient Rhynchosporium Mildew Brown rust Net blotch 5 Ramularia4 Abiotic2
Anilinopyrimidine cyprodinil 2 - - 2 [1] [2]
Azole cyproconazole - [1] [3] - - -
epoxiconazole 2 1 3 2 1 [2]
metconazole [2] - [3] [1] [1] -
prothioconazole 3 3 2 3 2 3
tebuconazole [2] - - [2] [1] -
Chloronitrile chlorothalonil (authorised until 20 May 2020) 2 - - - 3 [4]
Phthalimides folpet 1 1 - - 2 -
Imidazole prochloraz - - - [1] - -
Morpholine fenpropimorph (authorised until 30 June 2020) [2] 2 [1] [1] - -
Spiroketalamine spiroxamine [2] 2 [2] [1] - -
Strobilurin azoxystrobin 1 - 3 1 - [2]
pyraclostrobin 2 - 4 2 - [3]
trifloxystrobin [2] - [3] - - -
Strobilurin + azole1 fluoxastrobin + prothioconazole 4 2 3 3 1 [4]
SDHIs3 fluxapyroxad 4 2 3 3 - -
isopyrazam 3 2 3 3 1 -
SDHI mixtures1 benzovindiflupyr + prothioconazole 4 3 - 4 - -
bixafen + prothioconazole 4 3 4 4 2 -
boscalid + epoxiconazole 3 1 3 3 1 [4]
fluxapyroxad + epoxiconazole 4 2 4 4 1 -
fluxapyroxad + pyraclostrobin 4 2 4 4 - -
fluxapyroxad + mefentrifluconazole  - - - - [3] -
isopyrazam + cyprodinil 3 2 4 4 1 [4]
isopyrazam + epoxiconazole 3 2 4 4 1 [4]

Mildewicides Active ingredient Protection Eradication
Amidoxine cyflufenamid 3 3
Benzophenone metrafenone 3 1
Quinazolinone proquinazid 2 1

Match fungicides to the primary disease risk. This depends mainly on variety, sowing date, location and local weather. Mixtures and alternations of fungicides, with different modes of action, from different fungicide groups, are often most effective and reduce the likelihood that fungicide resistance will develop in pathogens. Resistance poses a significant threat to the performance of fungicides and resistance management must be taken into account when planning fungicide programmes. Fungicides are tested by AHDB in specific performance trials and in other research projects targeting specific diseases. Performance ratings are indicative and are dependent on dose and timing.


[] based on limited or old data

1 Mixtures with different active ingredient loadings are available, which may have different efficacy to those tested.

2 Spots not associated with any known fungi, but which can be reduced by fungicide treatment.

3 Significant resistance risk. Always use SDHI fungicides in mixture with at least one fungicide from an alternative mode of action group which has efficacy against the target pathogen(s).

4 Isolates with strong resistance to azoles and SDHIs have been found in the UK and these can no longer be relied upon for control of ramularia.

5 Isolates with moderate resistance to SDHIs are present in the UK and so performance of SDHIs may be compromised in some locations.

Barley seed treatment options

Updated April 2020

X = Label recommendation. Control may only be partial, please refer to product label

 Active ingredient(s) Product  Company  Crop  Seed-borne diseases Other diseases Pests
Loose smut Leaf stripe Covered smut Seedling blight: Microdochium nivale Seedling blight:
Fusarium species
Net blotch Yellow rust Take-all Slugs Aphids
(BYDV vectors)
Wire-worm Wheat bulb fly
fludioxonil Beret Gold Syngenta Spring
Winter
  X X X X              
fludioxonil, tefluthrin Austral Plus* Syngenta Spring
Winter
  X X X X           X X
fludioxonil, tebuconazole Fountain Certis Winter X   X X X X            
fluopyram, prothioconazole, tebuconazole Raxil Star Bayer CropScience Winter X X X X X X            
ipconazole, imazalil Rancona i-MIX Arysta Spring
Winter
X X   X X              
ipconazole  Rancona 15 ME Arysta Spring
Winter
X X   X X              
prothioconazole, tebuconazole Redigo Pro Bayer CropScience Spring
Winter
X X X X X              
silthiofam Latitude Certis Winter               X        
sedaxane, fludioxonil Vibrance Duo** Syngenta Spring
Winter
  X X X                
cypermethrin Signal Arysta Spring
Winter
                    X X

*Approval expires 31 August 2020

**Barley seed treated with Vibrance Duo must not be used for seed multiplication (certified seed)

×