Yesterday I noticed some tubercles of my Obregonia denegrii turned brown. The affected tubercles are still firm to the touch and are not mushy at all
https://imgur.com/a/xCdHA
I've also noticed a similar browning in my Euphorbia pseudoglobosa (this occurred weeks before)
https://imgur.com/a/dCTQK
And I'm not sure if it's the same condition, but the leaf edges of my Callisia navicularis also turned brown and look as if they've been nibbled on by tiny creatures
https://imgur.com/a/Hwk1Z
Could these be due to spider mites? I haven't noticed any fine webbing though. Or fungal infection? I hope not...
Mysterious browning on cacti and other plants
Re: Mysterious browning on cacti and other plants
Could be sunburn, but think the euphorbia and obregonia are suffering from rot.
- ElieEstephane
- Posts: 2909
- Joined: Tue Dec 13, 2016 12:10 am
- Location: Lebanon (zone 11a)
Re: Mysterious browning on cacti and other plants
I have the same problem you are having on the obregonia on some aloe nobilis. The "dry rot" can start from any side of the leaves. Still haven't figured out a solution other than ripping off the leaf
- Attachments
-
- 20171229_144528-1200x1600.jpg (81.49 KiB) Viewed 781 times
-
- 20171229_144246-1200x1600.jpg (58.68 KiB) Viewed 781 times
-
- 20171229_144305-1600x1200.jpg (69.43 KiB) Viewed 781 times
-
- 20171229_144223-1600x1200.jpg (94.84 KiB) Viewed 781 times
There are more cacti in heaven and earth, Horatio, than are dreamt of in your philosophy.
One of the few cactus lovers in Lebanon (zone 11a)
One of the few cactus lovers in Lebanon (zone 11a)
Re: Mysterious browning on cacti and other plants
Oh no. A lot of sources say dry rot cannot be cured with one source saying, "Remove and destroy diseased specimens". I can easily cut-off the affected euphorbia segments but I don't know what to do with the obregonia.
Another source says the fungus that causes dry rot is usually short acting and that improving weather conditions can deactivate the disease. Unfortunately, t's been stormy the past weeks here and although these plants don't get wet in the rain, the cold and humidity might be a factor or something.
Another source says the fungus that causes dry rot is usually short acting and that improving weather conditions can deactivate the disease. Unfortunately, t's been stormy the past weeks here and although these plants don't get wet in the rain, the cold and humidity might be a factor or something.
Re: Mysterious browning on cacti and other plants
Try to cut off infected tissue as best as you can. Disinfect with alcohol and powder( cinnamon or sulfur ).
Re: Mysterious browning on cacti and other plants
I removed the affected stems of the Euphorbia already but I just left the Obregonia as it is since removing the affected tubercles would be difficult. Weather has improved so I hope it would indeed deactivate the fungi
Re: Mysterious browning on cacti and other plants
Give your plants more sun and less water. Might me nutrient-deficiency as well. When one my Obregonia had some spots years ago I lost it next winter: these suffer from fungi.
If your cacti mess in your job just forget about the job.
°C = (°F - 32)/1.8
°C = (°F - 32)/1.8
Re: Mysterious browning on cacti and other plants
It does get lots of sun it's just that the weather has been stormy the past couple of weeks but it's all sunny now. Thanks! For one I'll observe and stop watering it for a while.7george wrote:Give your plants more sun and less water. Might me nutrient-deficiency as well. When one my Obregonia had some spots years ago I lost it next winter: these suffer from fungi.