Mineral fertilizer Fos

PKliquidplant defence enhacer

Product overview
Fos line is a family of liquid PK fertilizers that contains phosphorus mainly in the phosphite ion form. These formulations supply potassium and phosphorus while providing a systemic protective effect through enhanced phytoalexin production in treated plants.

Characteristics
Phosphite ion acts both as a nutritional P source and as a systemic agent that can stimulate the plant's natural defensive responses. Fos products are intended for professional agricultural use in fertigation systems and foliar treatments.

Packaging

• Bottle 1 L
• Jerrycan 5 L
• Jerrycan 20 L
• Drum 120 L
• IBC Tank 1000 L

Application

• Fertigation
• Foliar

Dosage and composition
CROPS | METHODS OF USE | FOLIAR DOSES (ml/l) | FERTIGATION DOSES (l/ha)
Grape, olive, citrus, fruit trees, tropical fruits, vegetables, ornamentals | 2–3 applications: at transplanting or throughout the cycle as a precautionary measure | 2–3 ml/l | 10–15 l/ha
The foliar dosage refers to a water volume of 1000 l/ha. For fertigation, Fos products are compatible with common water-soluble fertilizers.

Formulations
Fos K 50 — COMPOSITION: P2O5 30% | K2O 20%. CHEMICAL AND PHYSICAL FEATURES: EC 1:100 5.8 mS/cm | pH 6.8 | pH 1:100 6 | Density 1.35 g/cm3.
Fos PK+Cu — COMPOSITION: P2O5 15% | K2O 10% | Cu EDTA 2%. CHEMICAL AND PHYSICAL FEATURES: EC 1:100 12.7 mS/cm | pH 7.9 | pH 1:100 7 | Density 1.3 g/cm3.

Technical specifications

• Product family: Fos line (liquid PK fertilizers containing phosphite ion)
• Function: Nutritional supply of P and K; systemic protective role stimulating phytoalexin production
• Packaging: Bottle 1 L; Jerrycan 5 L; Jerrycan 20 L; Drum 120 L; IBC Tank 1000 L
• Application methods: Fertigation; Foliar
• Dosage (foliar): 2–3 ml/l (for 1000 l/ha water volume); 2–3 applications at transplanting or during cycle as precaution
• Dosage (fertigation): 10–15 l/ha
• Compatibility: Can be mixed with common water-soluble fertilizers
• Fos K 50 composition: P2O5 30%; K2O 20%
• Fos K 50 features: EC 1:100 5.8 mS/cm; pH 6.8; pH 1:100 6; Density 1.35 g/cm3
• Fos PK+Cu composition: P2O5 15%; K2O 10%; Cu EDTA 2%
• Fos PK+Cu features: EC 1:100 12.7 mS/cm; pH 7.9; pH 1:100 7; Density 1.3 g/cm3