Oxalic acid

[Davidrf]

I purchased two ready prepared bottle dispensers of OA but found I could treat the clusters using only one bottle. Is there anything to be gained from doing a second treatment in the New Year if weather conditions are suitable?

 

[Finman]

.
Do the treatment according this:
http://www.beekeepingforum.co.uk/showthread.php?t=20

 

[Davidrf]

Thanks Finman, but it doesn't actually address the question. Is there any advantage to repeating the treatment rather than wasting the spare bottle?

 

[Hivemaker.]

There is no advantage in winter, very likely to do more harm.
Throw it away and use fresh next winter.

 

[susbees]

I purchased two ready prepared bottle dispensers of OA but found I could treat the clusters using only one bottle. Is there anything to be gained from doing a second treatment in the New Year if weather conditions are suitable?

One treatment a year. Only.

 

[Arfermo]

I purchased two ready prepared bottle dispensers of OA but found I could treat the clusters using only one bottle. Is there anything to be gained from doing a second treatment in the New Year if weather conditions are suitable?

IMO, if the varroa drop is very heavy after the first treatment (count over say 1,000) then a second dose will do no harm so long as it is done before the queen recommences laying - in short mid Jan latest so as to allow the oxalic to have completely dispersed by the time she is ready. Personally, I sublimate/evaporate oxalic and the advice I have given is precisely the same for which ever method one uses and is available on other links on this topic.

 

[richardbees]

The consensus of all the beeks advice I've seen over the last few years is:

A Only use once, ideally 21 days after the first hard frost in your area (below -2c)
B Any leftover pre-mixed oa from suppliers won't last 12 months