The Hemlock trees in the Northeast are infested with an insect called the Hemlock woolly adelgid
You can see the white fluffy insects on the branch.But as long as the trees produce new cones for the next generation..there is hope for the Hemlock.
@olivetreeann the only thing folks have used in years last was this oily pesticide that was unsuccessful at killing the woolly a but killed everything else!They have also tried a species of ladybug with no luck.I fear for their ultimate future..but every cone keeps hope alive.
It makes me want to head out and get some tree shots. :)