Hello, is anyone able to determine what is the matter with my poor yucca, and what can be done to restore him? Thank you =)
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I am so sorry for the slow response to your post :(
It appears to me that the problem is most likely a fungal problem causing the black spot symptom. Common treatments for this include copper based fungicides; I have had success with this treatment on other plants. While I have not tried it, I have also heard and read that Neem oil treatment can also be successful.
Here is a link for making your own copper based fungicide. I hope this is helpful :)
https://www.gardeningknowhow.com/garden-how-to/info/diy-bordeaux-fungicide.htm
Once again, I apologise for the slowness of this reply.
- iCultivate
- 10 months ago
- #18
Hi Lyn
In the photos it appears that the new growth has significantly less infection with the fungus. Therefore, I think it would be worth trying the following before you remove it all:
1. Strip all the infected leaves off the plant.
2. Ensure you dispose of the leaves - do not add them to your compost.
3. Treat the remaining new growth with the fungal treatment.
You may find that this works and keeps your mature yucca in place.
If it doesn't work, then you could cut it all back and allow new growth to emerge, but I would try the above first.
Hope this helps.
Regards
Steve
In the photos it appears that the new growth has significantly less infection with the fungus. Therefore, I think it would be worth trying the following before you remove it all:
1. Strip all the infected leaves off the plant.
2. Ensure you dispose of the leaves - do not add them to your compost.
3. Treat the remaining new growth with the fungal treatment.
You may find that this works and keeps your mature yucca in place.
If it doesn't work, then you could cut it all back and allow new growth to emerge, but I would try the above first.
Hope this helps.
Regards
Steve
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