I've never used either product. However, I have used a product called Pyganic, which is a highly concentrated pyrethrin (it's $$, but a little goes a very long way). Works great on mites and aphids.
Also, I think feldon has had good results with Green Light Fruit Tree Spray, which is pyrethrins and neem oil.
Point is -- since Take Down has pyrethrins in it, it should definitely help with your mite and aphid problem. I'll be interested to see if it takes care of the psyllids as well.
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