>Waldemar
>I am thinking: in the cold
> temps the cold solution may kill some outer-layer bees although this
> kill may be insignificant.

Waldemar and others !

The weather here usually gets cold before I get a chance to use oxalic. Like 
I wrote before temperatures below 0 C are almost a norm for me and no 
problems . But I do use warm oxalic liquid. + 20 - + 30 C. I have the jar in 
a cooler box with a canister of warm water and only take out the amount 
needed for one yard at a time.

Sugar syrup with oxalic runs through a syringe much easier when warm and 
also makes smaller drops. I think that I can hit the bees better with 
smaller drops and maybe get a better result.

The oxalic solution should not be kept this warm as acidity breaks the sugar 
for HMF which is harmful for bees. I keep mine cold, and take it in to the 
house previous day to warm up. Normally I only make what I need in the next 
2- 3 days.

I am using 75 g / 1 litre of water / 1 kg sugar

I know smaller amounts around 60 g do also still work quite well, but 75 is 
no a problem for bees so I use it.

Ari Seppälä

Finland

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