A new usefull point is that don't use normal sugar + fructose in the patty.
Use inverted Apifonda or similar. To morrow I was going just to visit beekeeping stuff deliverer. But Apifondas price is 2,5 fold compared to sugar. However part of patty should be fructose.
What a great and informative lecture and from what better source can information come than that, how can we get more members to listen to this, it would help the health of our bees no end, even if we cannot alter what farmers put on crops.