couldn't help but notice the bed and surrounding weeds is brown from spraying. Could it be possible that herbicide drift fell upon the low side of this evergreen?
Often, I have been to estimates of this sort and seen things like this after misapplication of herbicides purchased from lowe's or wal mart.
The containers sold over the counter today is a bit confusing to the consumer.
Other than that..........I might suspect mites or even more leaning toward blight.