>I don't use sticky boards and count because it's a lot of trouble and I couldn't tell the difference between a mite and a speck of dirt.
Sure you can. Depending on your eyesight you may need a magnifying glass, but they are quite distinct from a speck of dirt.
>I think I am as effective as when I used Apistan but am I?
Since you're not counting, I don't know. But here's the problem with any treatment while there is brood:http://www.bushfarms.com/beesvarroatreatments.htm
>Also, is this organic?
I beleive it's an artificially created sugar. But it's a lot more natural than Fluvalinate (Apistan) or Cumaphos (Check Mite).
>Should I be using powdered sugar instead of Sucrocide?
Are you happy with the Sucrocide? Would powdered sugar save you a lot of money? Trouble? Would you be happier finding a way to not need to treat at all?