A few pics from today's job

[skyhuck]

I just wonder if the odd mature trees that don't get DED have thiner cambium, there are a few decent sized ones near me that are healthy, right next to ones that have died.

[swinny]

I just wonder if the odd mature trees that don't get DED have thiner cambium, there are a few decent sized ones near me that are healthy, right next to ones that have died.

 

where abouts are these ones? it'd be good to have a look

[Tnarg25]

are there different strains or do some trees just have a higher tolerance of the disease? some trees around here hang on for years showing signs of dutch elm where others seem to die really quickly.

[RopeKnight]

Here in Ontario it is the Beetle that kills them before the DED, not all of the time but I would say alot of the time.

DED will show as leaves flagging then browning and hanging on for awhile on a limb.

Beetle will mine out whole tree with quick sudden death.