It appears now and then articles in especially the German language stating that the enlarging of cellsize historically never have occurred, but instead what’s happened is going back to normal larger cellsize. And those decreasing cellsize is doing something unnatural.
I have prepared for and selected for varroaresistance for quite some years. Last year I learned how to test a colony for VSH, a simplified method described by John Harbo, easy for everyone to use. DWV-bees on the hardboard Before