PHOSGUARD Zn-Mn
| FUNCTIONS: | Plant defence activation – Vegetative growth – Zinc correction – Manganese correction – Photosynthesis support |
| FOR: | Cereals, maize, citrus, vines, and orchard crops prone to zinc and manganese deficiency during early growth |
| SOURCE: | Synthetic |
| APPEARANCE: | Liquid |
| PACKAGING: | 20 L – 1000 L |
SPECIFICATION |
W/V |
|---|---|
| Phosphorus (P2O5; +3 valence) | 37% |
| Zinc (Zn) | 7.5% |
| Manganese (Mn) | 7.5% |
Description
PHOSGUARD Zn-Mn is the zinc and manganese grade, a liquid phosphite built around two of the most common early-season micronutrient deficiencies. It carries high levels of zinc and manganese in available form, supporting vigorous vegetative growth while the systemic phosphite adds defence support over the same window. Zinc drives the auxin and protein synthesis behind shoot and leaf development, and manganese underpins photosynthesis and nitrogen use. The grade suits cereals, maize, citrus, vines, and orchard crops through the establishment and early growth phases.
Key Benefits
- Activates natural defence pathways. Phosphite primes phytoalexin and phenolic synthesis and cell-wall reinforcement, keeping the crop’s own defences active through early growth.
- Builds resilience to oomycete pressure. The phosphite is directly unfavourable to organisms such as Phytophthora and the downy mildews, supporting young crops alongside the induced defence response.
- Corrects zinc and manganese deficiency. Zinc supports auxin production and protein synthesis behind shoot and leaf development, while manganese drives photosynthesis and nitrogen assimilation; supplied together they address two of the most common early-season shortfalls.
- Moves systemically into new growth. Full translocation carries both the nutrients and the defence activity to expanding shoots and leaves.
How It Works
PHOSGUARD Zn-Mn delivers phosphite, the phosphonate ion, which crops absorb quickly and move systemically through both xylem and phloem after a foliar spray or fertigation application. Inside the plant, phosphite acts in two complementary ways that depend on concentration. At higher local concentrations it is directly unfavourable to oomycete organisms such as Phytophthora, Pythium, and the downy mildews, slowing their growth and energy metabolism. At lower concentrations it primes the crop’s own defence system, triggering the synthesis of phytoalexins and other phenolic compounds, reinforcing cell walls with lignin and suberin, and raising the activity of defence-related enzymes. Because it is fully systemic, the protection reaches new growth and tissues the spray never directly contacted.
Zinc and manganese carry their own nutritional roles. Zinc is required for auxin production and protein synthesis, both central to shoot and leaf development, while manganese is a cofactor in photosynthesis and nitrogen assimilation. Supplied together in available form, they correct two of the most common early-season deficiencies, and the systemic phosphite adds defence support over the same growth window.
When to Use PHOSGUARD Zn-Mn
PHOSGUARD Zn-Mn is aimed at the establishment and early vegetative phases, when zinc and manganese demand is highest.
- Apply PHOSGUARD Zn-Mn during establishment and early vegetative growth to support vigorous shoot development.
- Use PHOSGUARD Zn-Mn where zinc or manganese deficiency is expected on cereals, maize, citrus, and vines.
- Include PHOSGUARD Zn-Mn in foliar or fertigation programmes to pair early-season nutrition with defence support.
Plants mount their strongest defences when they are healthy and unstressed; when a crop is under pressure those responses slow, which is exactly when systemic support earns its place. Applying ahead of and through high-pressure periods keeps the crop’s defences primed when it cannot fully prime them on its own.
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