Oh, I see. In my first post, I never said the words "when talking
about root rot" . So let me say this clearly: systemic fungicides
aren't much good with root rots. They can be very effective with some
foliar diseases. But their effectiveness is mostly in preventing new
disease due to the superb coverage allowed by a systemic (the fungicide
moves around inside the plant and gets to places you missed when
spraying); the eradicant action is over-rated.

Nina, never as clear as she means to be.