How to reduce potato foliar diseases

Nitrogen applications can have the effect of encouraging foliar diseases, particularly applications later in the season which delay maturity and increase the risk of blight infection.

Nitrogen excess increases the risk of foliar disases

Nitrogen is an essential nutrient to fuel canopy growth, however in temperate climates, an excess supply of nitrogen at later stages of growth will keep the crop growing, delaying maturity place the crop under increased risk of blight.

Nitrogen for is also an important consideration as too much ammonium nitrogen is a disadvantage as it reduces root zone pH and thereby promotes rhizoctonia.

Other crop management practices influencing foliar diseases

  • Ensuring blight spray programmes are effective
  • Scheduling irrigation to maximize quality characteristics

Recommended Yara fertilisers for potatoes

How to make better informed nutrient decisions

Our collection of tools help you to make better nutrient decisions in making the right fertiliser choice and applying the right amount of nutrients at the right time and in the right place so that the crop yield and quality can be maximised whilst still keeping costs in check, avoiding over-fertilisation and protecting the environment.