Sudau Agro GmbH

- Model 38 - Bio Stimulator

NU-PHOS 38 is a completely water soluble foliar fertiliser suspension based on ammonium and potassium phosphite. NU-PHOS 38 activates the nutrient acquisition capacity and promotes the formation of the plant’s own defence system. NU-PHOS 38 is rapidly absorbed by the leaves and systemically distributed throughout the plant. Phosphite itself cannot be used by the plant as a source of P, however, it makes the plant „think“ that it is latently suffering of phosphate deficiency. The plant responds to this with intense root growth, especially during the vegetative development phase. On its intense search for new P sources in the soil, it develops a pronounced acquisition capacity for water and soil nutrients.


Bio-stimulator. NU-PHOS®38 improves the plant’s own defences.

Improves water use efficiency and stimulates root growth.

EC fertiliser: NK fertiliser solution; 4 % N total nitrogen as ammonium nitrogen (52 g/l), 15% K2O water soluble potassium oxide (201 g/l);

NU-PHOS®38 is a patented formulation containing ammonium and potassium phosphite with dimethyl sulphone, the phosphorus content is 38% P2O5



  • Strong and rapid growth-stimulating effect
  • Improves the plant’s own defences
  • Improves root growth
  • Increased quality and yields
  • Ensures rapid translocation of sugar, starch and fatty acids into the storage organs
  • Improves the colour, aroma and flavour of the harvest products
  • Extends the durability and shelf life of the produce
  • Increases yields on all crops
Product use

Any time there are upcoming important phases for yield development, low soil temperatures or pH values fluctuations that may limit the availability of soil nutrients.

The treatments are best performed in split applications just before important physiological stages.

Field crops

Cereals: 0,5 – 1 l/ha; first application from the two-leaf stage (EC 12) to the two-node stage (EC 32) and second application from the flag leaf stage (EC 39) to full flowering (EC 65).

Grassland: 1,0 – 2,0 l/ha; first application from the two-leaf stage (EC 12) to the beginning of flowering (EC 61); second treatment as soon as growth is initiated again after the previous mowing.

Rapeseed: 1,0 l/ha per treatment; first application in winter rapeseed from the 5-leaf stage to the beginning of stem elongation. Follow-up treatment at EC 61 first flowers open.

Potato: 2,0 l/ha 7-10 days before the beginning of flowering or when the tubers have reached a diameter of 0,6 – 2,4 cm, follow-up treatment after 3 – 5 weeks.

Sugarbeet: 1 l/ha at the 4- to 6-leaf stage. Follow-up treatment 2,0 l/ha at row closure.

Maize: 1 – 2 l/ha per treatment; first application at the 4- to 8-leaf stage. If necessary, follow-up treatment 14 days after the first treatment.

Vegetable crops

Onion / leek: 2,0 l/ha at the 3- to 6-true leaf stage.

Peas: 1,0 l/ha from the 2-leaf stage with stipules and tendrils unfolded to the 6 fully developed leaves stage. 1,0 – 2,0 l/ha at the stage when the first flower buds become visible (ideally) until the beginning of pod formation.

Beans: 1,0 – 2,0 l/ha at the 4-node stage until the flower buds become visible.

Carrots: 1,0 – 2,0 l/ha when the roots begin to expand.

Kohlrabi: 2,0 l/ha at the 6- to 10-leaf stage.

Broccoli, cauliflower and Brassica species: 1,0 – 2,0 l/ha at the 6- to 8-true leaf stage.

Lettuce, spinach and leafy vegetables: 1,5 – 3,0 l/ha per treatment after plantation, singling or at the 2-leaf stage, second (and third if required) treatment at 10 – 14-day intervals or in case of nutrient deficiency.

Cucumber: 1,5 – 2,0 l/ha with 400 – 1000 l of water.

Strawberry: 1,5 – 4 l/ha for the first treatment at the beginning of flower bud formation, second treatment at full flowering, third treatment in the fruit development phase.


NU-PHOS®38 can be mixed with all commercially available crop protection products and foliar fertilisers. Mixtures with fungicidal copper preparations or oil additives are not recommended. For an application rate of 2,0 l/ha, dilute with at least 160 l of water.

Plant tolerance

NU-PHOS®38 should not be used undiluted. Do not perform foliar spray treatments in the midday sun, it is better to do it in the morning or evening.

Instructions for use

Shake the product before use. Fill half of the spray tank with water, switch on the agitator, add the required quantity of NU-PHOS®38 , and then fill the rest of the spray tank.

NU-PHOS®38 should always be added to the spray tank first before any other components are added. For an application rate of 2,0 l/ha, dilute NU-PHOS®38 with at least 160 litres of water – corresponding to max. 1,25 vol.%

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