Previsan S is a preparation based on Effective Micro-organisms (EM®) combined with a 100% organic binder, specially formulated to naturally protect leaves against pathogenic attacks.
Thanks to this plant-based binder, EM® adhere securely to the wax layer of leaves, even on plants with greasy or shiny foliage (cabbage, boxwood, laurel, photinia, rhododendron, beech, etc.).
Previsan S forms a protective biofilm acting as a physical barrier while promoting the beneficial colonisation of leaf surfaces by the principle of dominance.
Result: A plant that is more resilient, less sensitive to external stress, and with prolonged protection over time.
Benefits
- Creates a natural protective film on leaves;
- Improved adhesion of EM® on waxy surfaces;
- Extended microbiological effectiveness;
- Limits the development of pathogens;
- Helps prevent sooty mould caused by honeydew;
- Ecological and environmentally friendly solution.
Recommended application
March – April
2 to 3 sprayings of Microferm alone, in humid weather, to optimise soil colonisation.
Estimate: 10 L Microferm / treatment / ha.
April – September
8 to 10 sprayings of a solution composed of:
Apply 100 to 150 L solution / ha. Prefer dry weather with dew (open stomata).
October – November
3 treatments of Microferm:
- Start of leaf drop;
- At 50% drop;
- End of drop.
Recommended dosages
- 1 L / 100 L water.
- For targeted treatment: 1 L / ha.
- Renew weekly in case of strong pressure.
In case of plant stress (high humidity, pathogen risk), increase application frequency rather than dosage.
Important advice
- Prefer rainwater or well water (low in chlorine).
- Do not mix with chemical plant protection products to preserve microbiological effectiveness.
- Apply at the first signs of honeydew to prevent sooty mould.
Mode of action
Previsan S encourages the long-term colonisation of leaves by beneficial micro-organisms.
The resulting biofilm acts as a physical and biological barrier against pathogens.
If honeydew is present (aphids, etc.), the microbiological action helps reduce the development of fungi responsible for sooty mould.
