Cottonwood trees spitting
Everything under and around my cottonwood trees are covered in a fine white spray. What is it and what can be done to stop it.
Perkins County South Dakota trees and shrubs
It would be very helpful to have pictures of the tree and surrounding area: also close-ups of the problem "white spray," and of bark and leaves. Look for small insects on the leaves lower side. Do you notice many ants on the tree? You can upload pictures on this program.