The reference for Starks you give is only meaningful for commercial
growers ordering dozens of trees, not backyard hobbyists like myself.
Even if I were a commercial grower, only the apples seem to have
rootstock
specifications. The other fruits do not indicate anything about
rootstocks. If you order out of Starks retail catalog, you will also
have little if any information about rootstocks, and less assurance that
you
will be getting something they claim.