Aeonium arboreum problem

Use this forum to discuss matters relating to Aeonium, Crassula, Dudleya, Echeveria, Kalanchoe, Rhodiola, Sedum, Sempervium and related species. This is where one posts unknown plant photos for ID help.

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niemaciek
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Location: Poland

Aeonium arboreum problem

#1

Post by niemaciek »

Hello,
I've noticed recently some black spots on my aeonium. Small black spots are on bottom leaves like on the photos below. Do you know what it could be? I'll be thankful for advise :)
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Aeonium2003
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Location: Zone 9a

Re: Aeonium arboreum problem

#2

Post by Aeonium2003 »

I would say it is a fungal issue. However, it is definitely not A. arboreum or any arboreum subspecies. To me it looks like an A. ciliatum hybrid.
Growing in Zone 9b, Mediterranean climate.
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niemaciek
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Location: Poland

Re: Aeonium arboreum problem

#3

Post by niemaciek »

Aeonium2003 wrote: ↑Tue Jun 21, 2022 8:00 am I would say it is a fungal issue. However, it is definitely not A. arboreum or any arboreum subspecies. To me it looks like an A. ciliatum hybrid.
Thanks for info. If it is a fungal issue what would be the best way to get rid of it? Also if I'd like to propagate it from side shoots, should I resolve the fungal problem first?
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Paul S
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Re: Aeonium arboreum problem

#4

Post by Paul S »

Could it be red spider mite? Are there tiny web-like coverings on the leaf undersides?
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niemaciek
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Re: Aeonium arboreum problem

#5

Post by niemaciek »

Paul S wrote: ↑Tue Jun 21, 2022 10:11 am Could it be red spider mite? Are there tiny web-like coverings on the leaf undersides?
Nope, there are not. This is how the leaves look like underside.

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edds
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USDA Zone: A wet 8b!

Re: Aeonium arboreum problem

#6

Post by edds »

I think Paul might be along the right lines there and that is arthropod damage (aphids or mites) that has happened, possibly when the leaves were younger. As they are aging you're seeing secondary infections and/or the simple dying off of damaged areas first. If you were in the UK I'd suggest a spray with RoseClear that treats insects and fungi but not up to date with treatments on your side of the pond.
Nottingham, UK
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