I have three Dracaena fragrans house plants that were propagated form another large plant. I've found that two of them have White root rot disease. (The plant that did not have the fungus was the topmost cutting.)
Can I propagate healthy plants from their cuttings (that is, is the fungus confined to the roots, or does affect the whole plant, so that the propagated plants will also end up having the disease)?
[I suspect that the large plant I propagated the tree plants had some root issues (the leaves had yellow spots and were turning brown and drying out at the end), although I couldn’t identify any problems with the roots when I was replanting it, so I assumed it had to do with some unfavorable conditions. I’ve been having the large plant for a year or so, and except for the yellow spots on the leaves I got it with it seems to be doing ok. ]