This a big beautiful bush--except for here, where the bugs have been eating. Anyone know what leaves a bush looking like this??? As you can see, the healthy leaves are nice and green, but the unhealthy ones turn a pale green/white color and have lots of black powdery stuff on them--no good!
from the webbing in the photo, it could be red spider mites. The black stuff would possibly be 'honey dew' from their droppings
http://ohioline.osu.edu/hyg-fact/2000/2012.html
spidermites and sooty mold.
