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cactusvs

Beginner needing assistance

cactusvs
9 years ago

I received this cactus as a gift. I am not sure of exactly what kind it is.
It has what a worker at a plant nursery described as corky scab. He did not advise to cut away the scab but only suggested a fungicide (Liquid Systemic, Fungicide II) to dilute and spray every two to three weeks. I have read in other forums to cut away rot. Should I do this?
I have also repotted the cactus. When repotting, should the plant/soil be watered again? I don't want to do this in case it would be considered overwatering, though the soil is dry.
I live in Louisiana where the weather is quite humid. I decided to keep the plant indoors and crack a window open so it is ventilated. What else can I do, considering the environment here, to make sure it continues to grow?

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