I have used Sta-flo, Magic Sizing, and Niagara Start on lots of fabric and had it stored in totes, drawers and boxes for long periods of time and not had any bugs. Not sure why I have been lucky, it may be because it is hot out here and not muggy. I didn't know that there was a heavier commercial starch. It would be interesting to test it out and see if it does make a difference. I have settled on the Sta-flo because I can make it as strong or as light as I want it for any given project and it flakes the least for me.
One blog site (that I can't find for you) has the person spray her fabric and then place it in the refrigerator over night so that the starch will soak into the fabric real well. When I was little my mother would sprinkle her cotton with water, roll it up, put in a stack and start ironing the first sprinkled item. I guess this is the same concept.
Good luck on your search.