Re: Diseased tree

Joanne wrote:
> My neighbor has a plum tree next to my fence. The tree if full of large 
> black blobs. It gets worse each year. Does anyone know what this is and
if 
> it can spread to my cherry tree?
> 
> Joanne 
> 
> 



It is a fungus called Black Knot.  It can spread you your cherry tree.
If there are many 'knots' present, I would suggest cutting down and 
burning the tree to kill the fungus.  Otherwise, treat it with a proper 
fungicide.


Here are a couple of links.


http://ohioline.osu.edu/hyg-fact/3000/3011.html


http://www.umanitoba.ca/afs/hort_inquiries/deciduous_ornamentals/black_knot.html