Factsheet: 1.2.3. FAM Dispenser
This official factsheet describes the use of the FAM dispenser with Formivar 70% and focuses on protective measures, required equipment, key points, and a clearly structured procedure. It specifically emphasizes that formic acid (Formivar) is highly corrosive and must be handled with great care. For details and the complete instructions, the factsheet is considered the authoritative reference.
Official Factsheet (BGD / SSA) – Summary
Factsheet: 1.2.3. FAM Dispenser (V 2505)
- Purpose: Safe use of the FAM dispenser in compliance with protective measures and the prescribed procedure.
- Section (anchor): Protective measures: “Formic acid (Formivar) is highly corrosive. Handling it requires great caution.”
- Safety requirement: “In all cases, safety goggles, acid-resistant rubber gloves, and long-sleeved clothing must be worn.”
- Required equipment: FAM dispenser; Formivar 70% (Andermatt BioVet AG); acid-resistant gloves and safety goggles (protective mask); measuring cup; container with water (for rapid rinsing in case of accidental acid splashes).
- Key points (time window): “First treatment before the end of July (after honey harvest); second treatment (two weeks later) to be started by mid-September at the latest.”
- Key points (handling): Place the dispenser “preferably early in the morning, when it is still cool”; “colonies must have access to open feed during treatment”; “do not feed during treatment.”
- Key points (reducing fumes): “Formic acid and the filled dispensers can be stored in the freezer before use. This considerably reduces fumes.”
- Procedure (anchor): “The dispenser’s instructions for use must be strictly followed.”
- Procedural step (example): “Fill the dispenser in a safe place with the correct amount of acid (see instructions for use).”
► Open the factsheet PDF directly on bienen.ch
If the link is no longer active: ► Official factsheet overview (bienen.ch)
Summary based on factsheet 1.2.3. (V 2505). Last review: 01/2026.
Learn more:
- Varroa: principles of control
- Natural Varroa drop: how to interpret it
- Hygiene: preventing transmission
- 10 rules of good beekeeping practice


