[gi53]

I was just wondering if it is better to powder sugar dust in the spring when there are not so many bees in the hive, and drown populations are real low. Or is it better in the fall?

 

[SwedeBee1970]

I believe this may help:

http://hirschbachapiary.com/Treating_Varroa_without_Chemicals.aspx

 

[danno]

If your going to depend on dusting and you dont monitor mite drop, it should be done on a regular basis all spring summer and fall.