Hello. We just noticed a few weeks ago that one of our 10 arborvitaes appears to be dying - it happened very quickly. After some online research, we discovered the tree is infested with bagworms. I have read a lot about them & now that it's August, it appears it is too late to spray them. We have hand-picked over 200 of these bagworms & it appears we have gotten most of them. They have moved to the adjoining arborvitaes & we, hopefully, have gotten them all off of those as well. What else can we do at this point? Anything? We have to spray in early May/June correct? Can the arborvitae be saved? It has some growth, but looks over 75% dead.