Publications

Practical measures to combat fungicide resistance in pathogens of wheat and barley

Fungicide Futures: Efficacy is in your hands

When fungicides are applied, susceptible fungal strains are usually controlled very effectively. However, any resistant strains present (through mutation or natural variation) are more likely to survive and reproduce. This process of ‘selection’ makes each subsequent generation more difficult to control. In the absence of any fitness costs, resistant strains may come to dominate the population, causing disease control to fail.

In wheat, septoria tritici is currently of greatest concern, with significant shifts in sensitivity to strobilurins and azoles in UK populations. Isolates with mutations that confer reduced sensitivity to succinate dehydrogenase inhibitors (SDHIs) are also present across the UK, with increasing frequency each year. For barley, ramularia is currently of greatest concern, with significant shifts in sensitivity to strobilurins, azoles and SDHIs in UK populations.

Though good disease control can be achieved in both crops by using robust fungicide programmes, it is essential to use comprehensive anti-resistance strategies to slow resistance development and preserve the efficacy of both existing and new chemistry.

AHDB has joined forces with the Fungicide Resistance Action Group UK (FRAG) to work on the Fungicide Futures initiative. With a focus on practical on-farm action, Fungicide Futures promotes powerful and consistent messages on effective low resistance risk fungicide programmes to growers of cereals and their advisers.

The publications enclosed provide practical measures to combat fungicide resistance in pathogens of wheat and barley, respectively.

The documents provide clear information on best practice use for fungicides, including non-chemical control, treatment frequency, timing, dose, mixtures, alternation, multi-sites and programmes.

ahdb.org.uk/knowledge-library/fungicide-futures

 

 

Related Pages

Related Publications

FF7 Practical Measures To Combat Fungicide Resistance In Pathogens Of Wheat