Elm tree under attack
There is a problem with our elm tree. I have attached photos. We had it pruned in the spring of 2017 by a professional but I don't know if the problem is related. The canopy looks fine. Can you help identify what is wrong and how we can treat it if needed? Thanks so much.
This looks like slime flux and no controll is necessary. There is more information about slime flux on the following page of our website. https://extension.umd.edu/hgic/slime-flux-and-wetwood-trees-and-shrubs
We also notice several crotches on the trunk. This can become a weak spot and develop occluded bark. All you can do is monitor the health of the tree. Keep it watered during dry periods and make sure mulch is no thicker than several inches and keep away from the base of the trunk. If you notice additional symptoms, you may want to have an onsite diagnosis regarding the health of the tree by a
certified arborist http://www.treesaregood.org/