Hello:

Live 25 miles due west of Boston.

Have a massive Hemlock, that an arborist says has some wooly agelard bug
infestations.
Not sure if he's right or not

Anyway, i'm willing to blow a few hundred to have it treated.

My question is:

Is this the best and "right" time of the year to have it sprayed here in the
northeast ?

If so, what with (just leave it to him, or tell him I want the oil spray,
or...what ?) ?

Much thanks,
Bob