If you do not have AFB and able to Recalculate then it should be ok. 1 kg Sucker, 1 l water and 100 gram oxalic acid . From this mixture is given 3-3Â½ ml each frame gate. You should end up with a ca 3% soultion.
Jorn, OK you have lost me. I don't have any foulbrood, American or European, thank goodness. I only had to deal with that varroa mite stinker. I think it would be far safer if I just use the 1:1 sugar syrup and oxalic acid. I am terrible at any kind (even the most simple) mathematical equation. I am spelling, typing, and gardener pro.
I have 4 hives that I will be treating (maybe a very small 5th one, but it is probably now dead I would assume). It was pretty weak the last time I checked and plain and simply was not able to get out to the apiary to unite it with another (this weak colony). But we will see. I have 10 frame Langstroth hives. I will see the strength of the colonies, and how many frames of bees each today. It is sitting at +1 C this morning at Abbotsford, which is across the river from me and further inland. We are closer to the mountains and live in a cold spot. We live in a little big higher elevation and about 1 km surrounding our immediate area it is quite colder. So, I venture it is probably maybe -1 C right here. Of course will be warmer today later, probably +4 C.
I see you put your face picture in your avitar, nice to see that.
We did not get the horrible 90 km winds last night that they were calling for, thank goodness. Great day. Cindi