Bill Lord wrote:
I am about to begin oxalic acid applications to broodless colonies and
I am curious to know what concentrations people are using for winter
broodless applications.

Bill
Here you have a good system to apply OA as gas with excelent results. About 
10 seconds per colony is enough without spraying or dropping water inside 
the beehive. The mask is absolutely necessary for your health. Stand with 
crosswind.

http://www.youtube.com/watch?v=RcKyE1FRNeg&feature=youtu.be

You will see a heat gun blowing a paint can of 1/4 liter with OA inside a 
paint can of 1 liter. In the other site a nozzle made with a steel sheet 
#27. With each charge you can treat 80 colonies quickly. Designed, builded 
and used by Ricardo and Juan Manuel Prieto, queenbees breeders from Junin, 
Buenos Aires, Arg.

best regards
fernando
Córdoba, Argentina 


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