What’s The Growth On My Night-blooming Cactus?

My night-blooming cactus has been developing thick brown scab-like growths on new leaves for about a year. Once they appear, they tend to spread quickly and look like they kill the leaves. I repotted a few months ago and the new growth looking great! No signs of black growth, however now it seems to be returning. I was spraying with Neem oil weekly and not noticing effect. Any advice would be so helpful!

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1 Comment To "What’s The Growth On My Night-blooming Cactus?"

#1 Comment By BushDoctor On 10/11/2022 @ 10:29 am

This is bacterial. Make sure that this is planted in a cactus mix, and neglected, as far as watering goes. They do not do well in moist soils.

From here, you will need a strong fungicide. I would contact your local agricultural extension service to make sure of which one's are OK to use in your area. Wettable sulfur is a good one for general use, and is usually safe for any people around. It makes for a decent bactericide. sulfur is, generally, lacking from the soil anyway.

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm ^[1]

https://www.gardeningknowhow.com/garden-how-to/info/what-is-copper-fungicide.htm ^[2]

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/side-dressing-with-sulfur.htm ^[3]

https://www.gardeningknowhow.com/ornamental/cacti-succulents/night-blooming-cereus ^[4]

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[1] https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

[2] https://www.gardeningknowhow.com/garden-how-to/info/what-is-copper-fungicide.htm: https://www.gardeningknowhow.com/garden-how-to/info/what-is-copper-fungicide.htm

[3] https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/side-dressing-with-sulfur.htm: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/side-dressing-with-sulfur.htm

[4] https://www.gardeningknowhow.com/ornamental/cacti-succulents/night-blooming-cereus: https://www.gardeningknowhow.com/ornamental/cacti-succulents/night-blooming-cereus

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