This may not be the correct forum for this problem but here goes. I planted several emerald green arobrvitae three years ago and they were doing great, but now several of them have huge brown dead sections on them. Someone suggested it might be bagworms but I don't see any. I did have a problem with bagworms last year with one of the plants and I pulled them off and burned them. Help! I don't want to lose these plants. They would be very expensive to replace.