Fast acting formic acid for use with dispensers reaches also Varroa in sealed brood cells
ORMIVAR® 85 is best used in heavily infested colonies to get immediate reduction of Varroa infestation in the first three days of application. For the use in proven formic acid dispensers like Liebig or FAM-Dispenser only.
FORMIVAR® 85 will be used according to the instructions of the manufacturer of the dispenser. The recommended period for use is directly after the honey harvest, after the removal of the honey frames with honey for human consumption. Best results are achieved at temperatures between 15 °C and 30 °C. Formic acid vapors penetrate also the thin wax cover of the brood cells and reaches Varroa inside the brood cells. It is therefore commonly being used in colonies with brood for short treatments of 4 to 10 days.
Formic acid vapours act fast on Varroa. Varroa mite fall peaks on the second and third day. The use of formic acid may cause brood interruption. Vapours may cause some fatal damage to brood and emerging bees. Occasional Queen loss has been observed with shock treatment and at elevated temperatures. Formic acid acts only while vapours are generated and present. After the treatment vapours are removed by ventilating bees and the action stops. Since formic acid is soluble in water it will be found as residue in honey and nectar present during treatment also in capped honey cells. Feeding during treatment may lead to robbery.
Use safety goggles and protective clothing when working with FORMIVAR® 85.
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