Dark weeping from Elm? Is it dutch Elm disease?

[St. John]

I can provide a photo later this week.

Pacific NW. Large Elm trees in a row. 3 out of 12 or so have blackish/redish puss/sap looking weepings from a crotch area.

Is this typical sap run? I had been told in the past that it was a symptom of Dutch Elm Disease but want to clarify.

Thanks. Glad to find this board.

 

[Raintree]

If you have DED most likely you will see some thing similar to this flagging in the canopy.

If your trees are looking like this.

You have Slime Flux (Bacterial Wetwood).

 

[St. John]

Wow. Thank you very much.

I always thought the "slime flux" was a sign of DED.

Appreciate the feedback and sharing of knowledge...
john