Harry Sweet wrote -
 
> >Joe Hemmens writes of an English product called "Certan" for wax moth
> >control.  Unfortunately, I do not believe the product (or anything like it)
> >is registered for wax moth control in the United States.
> >
> >W. G. Miller
> >Gaithersburg, MD
>
> It can only be used in stored equipment - so
> why bother? Para-di-chloro (moth balls) work
> just fine and can be found at your local drug store.
 
As I originally wrote,  the manufacturers state than Certan can be used
on occupied brood combs provided that the brood will not be chilled.
 
Joe Hemmens