Andy Firk and others have had this chronic problem of ever-bearing mulberry always being HEAVILY infested with scale/mealy bugs, with a nearby Paper Mulberry my apparent vector. I cut back the ever bearing a couple of months ago, swabbed the stubs with Neem leaf tea, covered them with a pipe filled with leaves (I've used this for years on roses and hot peppers) for two weeks, removed the pipe then watered. It is responding very well indeed! And no sign of pests. Some self sown Iron Clay cow peas are coming up, will let them mingle with the mulberry for more food and to provide nitrogen.