Your right about the C. ulmi
In school they told me that pressure-injection of a systemic
fungicide would help.
I believe it was Benlate (as benomyl)
The beatles carries the disease as a vector.
> A man in Connecticut found a way to save these trees; they recovered
>completely. He learned by experience that the succumbed "wherever the soil
>was low in calcium, magnesijm and moisture".
The fungus clogs up the xyleem, which provides juice to
the leeves. The definenties (spelling) you mentioned
help to kill the tree faster.
Dirk Mermans, ing