Not yet -- knock on wood. I've planted several varieties this year that have a lot of disease resistance because I've had problems in the past with crop diseases. However, not all of them are the super duper disease resistant kind. This is a new vegetable garden though. Up top in the field near my mailbox the former owners used to farm watermelons, canteloupe and corn, and I can only grow things that are wilt resistant up there. In a moment of weakness a few years ago, a mimosa -- a year later, gone. Cherries, gone. The crape myrtles and Prunus mume love it up there however.