Re: EFB options
There is a lot of published info showing that oxytetracycline should not be mixed into syrup "because it breaks down". Jim Tew published an article debunking this several years ago. OxyT works when delivered in a syrup, but it can be stored by the bees and could be removed by the beekeeper as "honey". To avoid this, oxyT should be mixed with powdered sugar and applied to the ends of the top bars above the brood nest.
NW Alabama, 50 years, 20 colonies and growing, sideliner, treatment free since 2005, 14 frame square Dadant broodnest