Black powdery substance on my Holly

NJ, United States

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?

On plant Ilex

27 Apr, 2008

Answers

Sid

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 :-(

29 Apr, 2008

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