Holly problem
Holly problem
Asked on 27 Apr, 2008
My dwarf holly bushes have a black powdery substance that has appeared on the lower leaves and seems to be spreading. What is this? How do I treat it?
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Joined 29 Feb, 2008
Hereford
29 Apr, 2008
Sounds like scale insects. They attach themselves to stems and suck the sap. Their poo drops down onto lower leaves and a black fungus grows on it. Sort out the scale insects and the black stuff will go. Only problem is, they are not all that easy to get rid of. I ended up getting rid of my Pyracanthus bushes that were effected :-(