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

MAINCROP S

14-5.7-17.4 + 2.2% S - A quality size matched NPK plus S size matched blended fertiliser, ideal for use for potato production due to the ratio in the of N P and K whilst including a useful amount of sulphur.

YaraLiva TROPICOTE

15.5% N + 18.8% Ca - Granular calcium nitrate fertiliser for field application to a wide range of crops.

YaraMila COMPLEX

12-4.8-14.9 + 8% S - Prilled NPK fertiliser which also contains magnesium and sulphur as well as micronutrients ideal for use on a wide range of arable and horticultural crops.

YaraVita MANTRAC PRO

A flowable liquid micronutrient fertiliser containing 500 g/l of manganese for application as a foliar spray or seed treatment to a wide range of crops to treat or prevent manganese deficiency.

YaraVita MAGPHOS K

A liquid fertiliser containing a high concentration of phosphate together with potash and magnesium for foliar application to potatoes and other crops.

YaraVita MAGFLO 300

A flowable liquid fertiliser containing 300 g/l magnesium for foliar application to cereals and potatoes or treat magnesium deficiency in a wide range of crops.

YaraVita CROPLIFT PRO

A foliar fertiliser containing multiple nutrients and micronutrients for foliar application to a wide range of crops during times of stress or periods of rapid growth.

See all fertilisers products

How to maintain potato health with nutrition

A well balanced crop nutrition programme will ensure that plants are robust and resilient, whilst avoiding excessive nutrient build up that can also be detrimental to plant health

How to reduce the incidence of potato soft rots

Potato soft rots are a range bacterial diseases that rot the tubers in storage. Correct crop nutrition prior to harvest, particularly calcium and boron has a positive effect against soft rots.

See all potato nutrition articles

Potato agronomy advice

Establishing potatoes successfully

As with any other crop, good nutrition is key to securing a healthy potato crop, one that will return good yield and high quality and ultimately achieve a better profit margin for you.

Biotrac helps combat stress in potatoes

There are many types of biostimulants on the market, each with different purposes. Yara's biostimulant products focus on is enhancing tolerance to abiotic stresses such as extreme temperatures or drought. They contain bioactive components that help the plant mitigate the effects of stress.

Biostimulants increase marketable yield of potatoes

Biostimulant products trigger natural plant processes that enhance nutrient use efficiency. Improved plant growth and abiotic stress tolerance help the plants to remain vigorous in hostile growing conditions so the farmer can generate better yield and quality.

See all agronomy advice

Looking for even more information ...

If you would like more information on potato agronomy or nutrition and would like to speak to one of our area managers or agronomists please find all their contact details here

Contact your local Yara area manager or agronomist

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