Hmmm
Looks like Thuja
Many up here looking like that, drought related, they're shallow rooters.
Once those guys get stressed it becomes bug bait fast.
If you are going to use fungicide use copper based not sulphur, I'd do a soil drench along with wetting agent and not tell Boa.
See, he'll get up me for killing all the good fungi too, but hey, like an operating table you need to steralize and then reculture the soil.
Heck I'd even perhaps add confidor to the drench to knock out any little bugs.