Function of Phosphate
Phosphorus is a major element which is essential for most crops to realise their potential. Many soils in the UK contain adequate levels of phosphate but there are certain times when the crop may not be able to satisfy its phosphate requirements from the soil.
Folex P is widely used on a range of crops which suffer problems with phosphate uptake particularly in early spring. Phosphate availability from the soil depends on a number of factors including soil temperature, pH, phosphate reserves and microbial activity.
In spring, crops will often have a small root system and soils are cold and wet; an application of Folex P at this time will help the crop to overcome these yield limiting conditions which restrict phosphate availability and uptake.
Phosphate and Potatoes
Even when soil phosphate levels are satisfactory, potato crops may fail to achieve their potential due to restricted phosphate availability.
Folex P is particularly suitable for use on the potato crop to assist with tuber initiation and the retention of formed tubers. During tuber initiation the young root systems of the potato are not sufficiently developed to draw adequate phosphate from the soil to meet daily demand. If plant phosphate levels are sub-optimal, plants may fail to grow to their potential due to the lack of available phosphate at critical times.
Applying Folex P, at the recommended rates, will ensure that young plants receive optimum phosphate until root systems are able to draw their requirements from the soil. Applying Folex P can also increase the number of tubers formed by extending the tuber initiation period.
Use Folex P when phosphate deficiency is diagnosed or suspected, when crop demand is high and cannot be met by soil reserves or as part of a nutrient management programme on potatoes. Foliar uptake will be enhanced by the addition of NA13¹ unless already in tank mix with a pesticide.
Apply 7-17.5 l/ha, in a minimum of 200 l/ha water.
The spray tank should be filled with half the required water. If applicable, add the required amount of NA13 to the water before the Folex P. Measure the required amount of Folex P and add to the tank whilst maintaining constant agitation. Add remaining water to correct dilution and spray.
Do not apply in tank mix with pesticides when crop is showing deficiency symptoms, is under stress, or in adverse weather conditions.
¹ NA13 is an adjuvant designed to help with improved adhesion, deposition and penetration of the spray solution on the leaf surface. NA13 should be added at 0.1% of the spray volume, e.g. 100 ml in 100 litres of water. Maintain agitation and apply immediately after mixing.