light brown layer on stem

Under it is green. If I rub off with finger, it comes back the light brown colour. What is it and how do I get rid of it? Thanks.

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1 Comment To "light brown layer on stem"

#1 Comment By Alisma On 10/30/2016 @ 10:59 am

Is this a Christmas cactus? Here is a guide to diseases of Christmas cactus. Perhaps Botrytis blight could cause these symptoms.

https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/christmas-cactus-diseases.htm ^[1]

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[1] https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/christmas-cactus-diseases.htm: https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/christmas-cactus-diseases.htm

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