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Q.I’m concerned about my Cactus, I have no clue what is wrong with him. Do you know what could be causing my cactus to appear this

Zone Oak Creek, Wisconsin | Anonymous added on August 4, 2019 | Answered

way? I have had my cactus since the summer of 2014, I do not remember what type exactly my cactus is. I recently discovered this big weird patch area and I’m worried that my cactus could be dying and or something is seriously wrong with it.

GKH_Susan

Certified GKH Gardening Expert

Answered on August 4, 2019

I believe your cactus plant is a species of Pachycereus.

There are several possibilities for the drying of the tissues, or "corking". It could be a bacterial or fungal infection, worst case is "bacterial necrosis" which is common in the big saguaros.

https://www.gardeningknowhow.com/ornamental/cacti-succulents/saguaro/bacterial-necrosis-of-saguaro.htm

But it could also be due to sunburn or phyto-toxicity. Has it been sprayed with anything? Intentionally or accidentally?

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