sedumzz said:Hmmm, the stem isn't rotten?
Actually for 'Amaranth' their even stayed several days outside any substrate and I have still seen them develop this random leaf one at the time mushiness.
Maybe the pathogen entered and continues to stay (like with Botrytis for example), but to answer you direct question about the stem, several rosettes in different pots had no rotten stems or roots.
Actually I cannot recall seeing stem or root rot like for example I know I had seen with Hylotelephium in other areas of the property.
I could be a mold indeed, surely many over the winter leaves in the spring and summer are gathered at the base of the stem beneath the thick succulent new leaves and those are just spraying with white spores when I pluck them, so I am as careful as I can without setting up a laboratory level of sanitation.
I have tried this year to use an agent good (Chinosol) against Botrytis on the stems where I have plucked the leaves, in an attempt to not throw away all the sempervivum.
Chinosol as 8-hydroxyquinoline sulfate.
But it is probably not going to be effective for reinfections as it is only to disinfect the area on contact.
But this is not exactly the mush random leaf issue that I am talking about.
Yet it might be the same pathogen since the same pathogen can express slightly different at different times, even Botrytis for example.
Now could Botrytis be the one affecting the Sempervivum?
A small magnolia tree which was around my Sempervivum plants seemed to have Botrytis for years, but I did not studied this subject until this year, but there you could see either the buds die, either the flowers blacken or get the green smargd mold (yes not grey as one would expect from Botrytis infections already seen in other parts of the plant)
This tree I have sprayed this year a couple of months ago and so far it has not expressed the pathogen so to speak, yet it barely had 5 flowers, which tells the pathogen still affected the Magnolia, yet not in the flamboyant style it usually did, where it the plant looks like something from the trash bin.
I asked the people who planted it to remove it, but you know how that does, usually people won't pull out what they planted themselves.
I wish guys on sempervivum-liste would go deeper into this issue, somewhat seems a bit brushed off now as some "mushy leaf" issue. I think a lot of importance should be given to pathogens.
