Several things can cause wilt of persimmons…
Bacteria…
S.D.S. ,…Sudden Death Syndrome. Xylella fastidiosa
Pseudomonas wilt
Fungi
Verticillium wilt
cephalosprium wilt
Borers
Persimmon agrilus ( a beetle )
Sannina uraceriformis ( a moth )
Likely other. Reasons too.
Many of these would be hard to I.D. For the home owner,
Symptoms can be similar , infection is internal, no good treatment.
Destroying infected stock likely best solution ?
A article about S.D.S.