Hello:

Live in New England, outside of Boston

Have a question about Woolly Adelgid bugs and Hemlocks:

Have a massive Hemlock in backyard that, for the first time I think, is
showing
several "leaves" on various branches which have turned an orange color.

Looking at them closely, I can find no evidence of white spots, white sacks,
etc.
on either the tops or bottoms.

Can anyone explain what might be happening ?

Water deficiency, time of year, etc. ?

Think it might be a Woolly Adelgid Problem, even without my
being able to see any evidence of ?

Much thanks.
Really appreciate the help.

Bob