Hi Jim
I missed off the first winter VC count.
These are the daily drop rates and treatments for the "bad" hive:
16/12/2018 VC 14/day (over prev 7 days )- then treated with Oxalic acid
27/12/2018 VC 65/day (over prev 7 days )- advised to repeat VC in a week
06/01/2019 VC 36/day (over prev 7 days )- then treated with 2nd dose Oxalic acid
19/01/2019 VC 3.6/day ((over prev 7 days) - wondering what to do now !
I was advised not to treat either hive in Autumn as VC were <1/day. (NBU Calculator also suggested not to treat but to observe in several months). In retrospect I think that was a mistake.
I missed off the first winter VC count.
These are the daily drop rates and treatments for the "bad" hive:
16/12/2018 VC 14/day (over prev 7 days )- then treated with Oxalic acid
27/12/2018 VC 65/day (over prev 7 days )- advised to repeat VC in a week
06/01/2019 VC 36/day (over prev 7 days )- then treated with 2nd dose Oxalic acid
19/01/2019 VC 3.6/day ((over prev 7 days) - wondering what to do now !
I was advised not to treat either hive in Autumn as VC were <1/day. (NBU Calculator also suggested not to treat but to observe in several months). In retrospect I think that was a mistake.