Treating scale on large, very-leafy plants?
I finally got around to repotting that huge Afrocarpus gracillior cluster I bought last year, and in the process I noticed it has scale. I wouldn't say it's a huge infestation since you sort of have to hunt around for them, but it's definitely present.
The problem is, Afrocarpus gracillior looks sort of like this:
Not my plant, but you get the general idea. Big, fluffy, and about a million little strap-like leaves. Getting good coverage with some sort of topical spray seems like it would be somewhere between Sisyphean and just outright hopeless.
I'd just as soon not get rid of the plants because I rather like them and it's not really a bad scale infestation, as I said, but I'm not too keen on it spreading to my other plants, either.
So I'm wondering if there's some sort of systemic or something that I coukd try. I have some neem spray although I'm not sure if that's concentrated enough to work (and I was also under the impression that it worked better as a system for insects that actually ate the leaves instead of biting/sucking one like scales..?)
Any help is appreciated. Thanks.