It's common practice among beekeepers in the UK not to use Bayvarol when honey supers are on. Nevertheless, Bayer, in their instructions are somehat ambiguous in this respect. Here are some extracts from the instructions covering this and similar questions that have been asked on bee-l over the last few days:- When to use: Best efficacy is to be expected when Bayvarol is used in late summer after the honey harvest. Ideally the strips should not be used during peak honey flow periods. However, Bayvarol can be used at any time of the year for diagnosis or in severe infes- tations where there is a threat to the survival of the colony. 1. Diagnosis The strips are inserted into the colony for 24 hours. Before inserting the strips the floor tray is covered with a clean sheet of paper. This is then checked for the presence of dead varroa mites 24 houres later. 2. Therapy The strips should be left in the colonies for a maximum of six weeks and then removed. Precautions: For Animal Treatment Only Keep out of the reach of children For diagnosis and therapy of Varroasis on bees only Avoid the strips coming into contact with honey to be harvested for human consumption Protection of Operators: When using do not eat, drink or smoke. Wash hands before meals and after work. Protection of consumers: No withdrawal period for honey is required regard- less of when in the year Bayvarol is used. Other bee produce should not be taken for human consump- tion until the Spring following the treatment. Pharmaceutical Precautions: Store in a cool dry place away from food. Do not open the foil bags until immediately prior to use. Do not use after expiry date. Dispose of used strips safely by wrapping in paper and placing them in domestic refuse. Flumethrin is dangerous to fish; Do not contaminate ponds, waterways or ditches with the strip or used packaging. -- Malcolm Roe Phone : +44 1442 345104 Crosfield Electronics Ltd Fax : +44 1442 343000 Hemel Hempstead, Herts. HP2 7RH, UK E-mail : [log in to unmask] ------------------------------------------------------------------------