Can anyone id this thing is that is eating my peach tree leaves......?

I've soaked the leaves multiple times with neem oil and it doesn't seem to affect them.  Hit them with 7 Dust and I think it may have stopped them.  I am curious to what they are.  They are only on the peach trees from what I can see.  The plum, apple, and cherries seem to be devoid of them. They decimated my new peach trees in short order.  The weird thing is that 6 other much older peach trees don't appear to have the things on them either.  They seem to be primarily on the underside of the leaves.  This pic was taken on macro settings through a magnifying glass.  The, whatever it is, is resting on the tip of a very small jewelers screwdriver for reference.  Many thanks in advance for any help offered.....

Hi Pat!
welcome to these forums!

Without seeing the leaves with the damage I'm guessing leaf miners although you say the damage is mostly underneath the leaf?
I've never considered them a problem.

Nice photo of the culprit though.

7's dust is nasty stuff and not at all organic....we're just looking for and discussing organic or better solutions here😊

Sample of leaves.  I plucked the really bad ones off. As for organic solutions....Like I said previously,  I used neem oil extensively to no avail.  

good pictures of the damage.
I still think leaf miners and don't know a solution as I don't do anything about them myself.
For me the peach tree borer is the only thing that kills my trees and even then I do the minimum of organic treatments.

is this affecting all of the leaves on the young trees?

Here are some photos of one of my trees with just the beginning of leaf miner damage...it will get worse but never seems to  hurt the health of the tree....this tree is older though, maybe 6 or 7 years?

I hope someone can suggest a preventative that works for you.

Your leaf damage looks like the same damage mine are experiencing. So, leaf miners are the culprit I suppose. Yes, the trees are young; planted last fall.  They are about 4' high.  They came on strong this spring and then the damage started to occur.  They don't have a lot of leaves to spare at the moment.  They have essentially attacked all the leaves to one degree or another. Leaves equal energy.  Fewer leaves, less energy....Thanks for your speedy replies BTW.....

A soapy water solution spray might kill them though I have no experience.