Peter Borst wrote

> Another presenter of note was Keith Deplane. He showed that coumaphos, 
> fluvalinate and copper naphthalate caused significant increases in queen 
> supersedure, which is a serious problem for beekeepers everywhere.
I am interested in the problems with copper naphthenate.  Here in Australia 
there have been no real problems that I am aware of and from my own 
experience I have no problems.  I wonder if it is down to the method of use. 
I know from some previous published work that the concentration of copper 
naphthenate used in the USA was a lot higher than I use and found necessary 
for decay prevention.  Also the supers (boxes) are not painted on the inside 
whereas I do.

Is this paper of Keith's available or do I need to contact him directly?

Trevor Weatherhead
AUSTRALIA 

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