We have an Ash tree. Summer just started where we live and the leaves are falling from all over the tree. No other substance is coming off the tree. Below is a pic of the leaf I pulled off the tree and one of the way leafs are falling. I appreciate any feed back. Also, how much water does a 30 year old Ash need daily? Thank you from MN.
A guess as to why your ash leaves are falling is ash anthracnose, a fungal disease that afflicts ash and other trees in cool, damp, spring weather. It results in leaf drop and the leaves will typically have brown or black blotches that appear on the leaflets that often become distorted, curling toward the blighted areas.
Fortunately, anthracnose does not cause serious harm to healthy, well established trees. The affected trees continue to leaf out. Leaves that develop later in spring usually are not affected, as weather conditions are less favorable for anthracnose development. There is no need to apply a fungicide to affected trees.
Read about ash anthracnose here: https://www.ag.ndsu.edu/news/newsreleases/2010/may-17-2010/anthracnose-hitting-ash-trees-hard