I planted this pear tree last year and it did well, but in the last couple weeks I've noticed it looking worse and worse. Does anyone know what's wrong? And what I can do about it? I'd hate to lose it, and my other pear tree is just starting to show the beginnings of the same problem.

A lot of the leaves look like this:

{{gwi:121669}}

A few look like this:

{{gwi:121670}}

Here's a branch:

{{gwi:121671}}