In a message dated 23/09/2006 19:31:27 GMT Standard Time,  
[log in to unmask] writes:

The concentration of the syrup seems to be more important than that  

of the acid.

That's not the impression I get from the European  literature.  
 
 



Paper no 122 delivered at Apimondia at Dublin covered a comparison between  
different oxalic acid treatments in overwintering colonies.  The test was  
conducted in Italy in 2 apiaries of 50 broodless colonies randomly split into 5  
groups. 3 groups were treated by trickling various concentrations of 
OA/Sucrose,  no 4 was treated by sublimation and the last group was left untreated as a  
control.
 
The trickling groups were 4.2%OA/60% sugar; 3.2 OA/60%sugar; 4.4%OA/  
30%sugar.  Efficacy was respectively 87.7%, 87.1% and 70.3%. The authors  say:" The 
significantly lower motality in group C stresses the need of a high  sugar 
concentration in solutions intended for trickling." and  " The  sublimation was 
time expensive and required heavier protections than the  trickling."
 
Chris

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