Mites on raspberries
I have a 15' row of Heritage red raspberries that appear to have a mite infestation. They are small, teardrop-shaped and whitish. Some of the raspberry 'kernels' are completely white instead of the usual red-purple. Perhaps the mites are sucking them dry?
Anyway, this is looking like a problem that is getting progressively worse, not better. I am under the impression that miticides are a specific product, and that many insecticides are not useful against these pests.
Are there any products that can bring these pests under control? What about minor details like toxicity, pre-harvest interval, etc. I have seen lots of miticides for flowers, but I'm not sure they are acceptable for food crops.
I don't suppose there is any chance soap and/or oil will kill them? What about this non-toxic miticide?