I had few contacts on the island: It seems that high colony kill may be 
caused by:
o    Over reliance on the efficacy of Apistan. It sounded that varroa is 
resistant to Apistan. Therefore, treatment failed. None or few producers 
had used Apivar. 
o   Varroa mite levels were not monitored often enough.
o    Last summer was very hot and dry.
o    Beekeepers delayed their harvesting to take advantage of late flows 
and consequently, delayed treatments.
o     samples will be tested for further information.

medhat


Medhat Nasr, Ph. D.
Provincial Apiculturist
Crop Diversification Centre North

17507 Fort Road
Edmonton, AB, Canada T5Y 6H3
Tel: (780) 415-2314    Fax: (780) 422-6096
Mailto:[log in to unmask]

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