There are some suggestions from Cornell here that may help, Rick. It's for a different scale than plantproblems' but that shouldn't make a difference.
http://idl.entomology.cornell....
I should add that the few times I've had them on plants they either haven't been bad enough to treat and I've scraped them off, or I've cut off the infested plant parts or disposed of the plant. Sometimes they just get worse if you leave them alone but one year I was surprised to find scales on daylilies which don't normally get them. They didn't persist into subsequent years though.
