EM Previsan S, EM leaf film

With Microferm and Cera Boost: the manufacturer's recipe mixes 34 fl oz (1 L) of Microferm, 34 fl oz (1 L) of Previsan S, and 3.5 oz (100 g) of Cera Boost per 26.4 gallons (100 L) of water, from April through September. Microferm can also be used on its own at the beginning and end of the season, following the schedule on our product page.

Use rainwater or well water if possible, since it's low in chlorine, and don't mix Previsan S with chemical pesticides, which would reduce the activity of the microorganisms.

No, Previsan S is not a pesticide or plant protection product: it is not a substitute for treating a plant disease or pest. It is a blend of EM microorganisms with a plant-based binder that helps the EM stick to leaves, even waxy ones. If your plants have a problem, ask a professional for advice.

Dilute 34 fl oz (1 L) of Previsan S in 26.4 gallons (100 L) of water. The manufacturer recommends a complete solution of 34 fl oz (1 L) of Microferm, 34 fl oz (1 L) of Previsan S, and 3.5 oz (100 g) of Cera Boost per 26.4 gallons (100 L) of water, applied at a rate of 10.7–16 gallons of solution per acre (100–150 L per hectare). For targeted application, the product sheet specifies 13.7 fl oz per acre (1 L per hectare). Apply more often rather than increasing the dose.

The manufacturer recommends this schedule:

• March–April: 2 to 3 applications of Microferm alone in damp weather (about 1.1 gal/acre, or 10 L/ha, per application);
• April–September: 8 to 10 applications of the Microferm + Previsan S + Cera Boost solution;
• October–November: 3 applications of Microferm while the leaves are falling.

Ideally, spray in dry weather when there is dew.