can I save viburnums?
One of my viburnums never woke up this spring, and part of another one look dead as well. After doing some searching, it appears as if there are borers. I think the one is completely dead...it was looking bad last summer, but I assumed it was just the hot weather and lack of rain in illinois. Is there any way I can save the one that is just starting to go? I'll have to cut down the dead one, but should I just cut down the other one too? I have 3 others that look good, lots of flowers and healthy leaves, no signs of borers that I can see. I there something I can put on the healthy ones to protect them?