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Drone Bee
- Joined
- Sep 16, 2009
- Messages
- 1,902
- Reaction score
- 750
- Location
- Merseyside
- Hive Type
- National
- Number of Hives
- 12
Not sure about this, but a couple of articles I have read suggest that although trickling oxalic acid/sugar should be done only once a year, sublimation by heating powder can be done several times. Have I got this correct and anyone else tried it? I ask because a couple of my colonies have not yet had any varroa treatment and I was thinking of treating in this way now and again in January.