Question
I'd love to save this tree, which has the symptoms.  I'm looking to see if there are any recent developments that might help reverse the affects of this disease.  The yellow leaves appeared after I pruned it one week ago and this morning the green leaves are all drooping.  If disease reversal is not possible, then mitigating and extending the life is the next choice.

Your expertise is appreciated.  Thank you.

Leny

Answer
Mimosa wilt is the most serious disease of landscape mimosa trees. The disease has spread rapidly throughout the Southeast and is limiting the usefulness of mimosa as a landscape ornamental in that region.

Symptoms
Symptoms of mimosa wilt include chlorosis (leaf yellowing) and leaf wilt by early to midsummer, after which many leaves may yellow and drop without wilting. Some trees die within a few weeks after first wilting, but most die branch by branch over several months. Almost all infected trees die within a year of first wilting. In advanced stages, infected trees ooze a frothy liquid from cracks and grow sprouts on trunks. Brown streaks develop in the roots on the side of the tree where branches first begin to wilt.

Managing Fusarium
A balanced fertilizer (10-10-10) may help alleviate symptoms in infected trees; never use high-nitrogen fertilizers. Infected trees should be watered frequently to decrease wilt symptoms, and dead branches should be removed and burned. Use 1 lb of 10-10-10 fertilizer per inch of trunk diameter, scatteed around the tree and watered in good, apply the fertilizer just before a rain storm and you will not need to water it in.Depending on how advanced the disease is in the tree will depend on on the tree reacts to the fertilizer.          

Because Fusarium is a vascular wilt pathogen, surface-applied fungicides are not effective. Even with systemic fungicides, chemical control of Fusarium wilt is not practical when treating established trees. The most economical control is to plant resistant cultivars of trees and shrubs.