Robert11 wrote:
Hi,

Live outside of Boston.

Have a few White Birch trees, some Maples and Oaks, and several trees that
I'm not sure what they are, frankly.

Some of the leaves, on most all of them, seem to be being "eaten," possibly
by aphids (someone thought, but wasn't certain), a bit..

Is there any spray that I can buy, that's effective of a real wide variety
of leaf-eaters, as well
as being near perfectly safe for all kinds of trees ?

Can it be used at any time of spring / summer ?

White Birch trees always get borers. But that is in the trunk rather
than the leaves. But white birch is a weed anyway. If you like the
looks of them, do a bit of research to find the right, disease-resistant
variety. Cut down the nasty whites and plant the better kind.