>Is this true even for feeding them to encourage frame drawing?. You are saying 2 parts sugar to 1 part water to feed now. Correct?
Yes. I've observed this for years and recently Randy Oliver experimented and came to the same conclusion. Stronger syrup has the same effects as weaker syrup. Either will stimulate comb building. Either will stimulate brood rearing. Either will simulate a flow. If you can get 2 parts of sugar to dissolve in 1 part water, that's what I would do. My hard water won't dissolve it, so I make 5:3. That's the point where I can get it to dissolve and not rapidly crystallize on me. I boil about 12 pints of water, dissolve a heaping tablespoon of Ascorbic acid (Vitamin C) in it and add about 20 pounds of sugar. This makes about five gallons of syrup that keeps really well.