Elm Scale is an insect that effects elm trees. It attaches to the branches of elms and sucks the sap out of the tree. This process creates an excessive dripping of honey dew attracting ants and flies and many different types of bugs. This dripping of honey dew from the canopy stains stucco and other finishes even cars parked under the trees get covered in this sticky substance. Apart from the mess it causes, it is also very stressful to the tree itself, keeping them from thriving at their full potential.