Hi cheekymonkey68, ladybirds and birds are the best and cheapest way to get rid of scale insects. The outer shell usually protects the scale insect from insecticides, so there's no point in spraying (this could also harm other wildlife). You can pick the insects off yourself, or wash off any residues of bug spray and wait for the ladybirds and birds to eat them.There's also a parasitic wasp you can buy (<em lang="latin">Metaphycus helvolus), but this option can be expensive.
Hope this helps<em lang="latin">
Kate
