Function of Magnesium
Magnesium is an element which is essential for a number of plant functions. Magnesium plays a major role in the process of photosynthesis and it is also involved with a number of enzyme systems and the movement of sugars from leaves to the rest of the plant. Magnesium is highly mobile within the plant and because of this the older leaves will generally be the first to show any deficiency symptoms.
Magnesium deficiency affects many crops including cereals, oilseed rape, potatoes, sugar beet, vegetables and grassland. Soils with high levels of potash, calcium and nitrogen may inhibit the uptake of magnesium. Low pH will also reduce the availability of magnesium to the crop. As magnesium is associated with chlorophyll and photosynthesis, the first symptom of deficiency is generally a yellowing of leaf tissue. Magnesium deficiency will seriously affect crop growth, quality and yield.
Use Folex Mg when magnesium deficiency is diagnosed, when SAP analysis shows low nutrient status, or as part of a nutrient management programme. Foliar uptake will be enhanced by the addition of NA13¹ unless already in tank mix with a pesticide.
Apply 3-7.5 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 Mg. After shaking the container, measure the required amount of Folex Mg 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.
² SW7 may be used as an alternative adjuvant on potatoes, legumes, and vegetables crops. Choose SW7 if it will be difficult to achieve good coverage, the leaves are waxy or tightly layered, or with dense crop canopies.