3.20 - Fumigation of comb Flashcards
A detailed description of the fumigation of comb using ethanoic acid (acetic acid), including safety precautions to be taken;
Precautions
Acid vapour will burn skin, ruin clothing and cause internal damage if inhaled
Wear gloves, eye protection and breathing mask/respirator. Overalls also recommended.
Material
80% v/v Acetic Acid + Absorbent pads
100% (Glacial) Acetic Acid can be diluted 1 part acid to 4 parts water for 80% concentration.
• Note 100% Acetic is frequently solid at low room temperatures which makes dilution difficult
Method
Start with a solid floor or board and place Brood Box/Super + comb to be sterilised on top. Place and absorbent pad on top and soak with 1⁄4 pint (140ml) of Acetic Acid, repeat with additional boxes and pads as required. Cover the top with crown board.
The floor entrance must be blocked and sealed and all gaps and joins should be sealed with packing tape or similar. If possible, the stack is best sealed with plastic sheeting or in a large plastic sack to minimise escape of fumes.
Fumigate for at least a week and then ventilate the combs for a further week before use.
Note:
the acid vapour attacks any metal parts such as frame runners or metal ends, surrounding metal and also concrete.
