Rust or spider mites on Cleistocactus winterii?

Trouble shoot problems you are having with your cactus.
Post Reply
Hokie_Cactus
Posts: 10
Joined: Thu Apr 07, 2022 5:54 pm
Location: Minneapolis, MN

Rust or spider mites on Cleistocactus winterii?

Post by Hokie_Cactus »

Hello everyone on CactiGuide! I am a bit new to the world of cacti, and this is my first post on the forums. I am looking for some help with a diagnosis and treatment for a problem that became significant about a week ago on a store-bought Cleistocactus winterii that I bought in January 2022. Can anyone tell me what this funky red/orange stuff is and what to do for treatment? Please let me know if additional pictures are needed.

20220407_175516.jpg
20220407_175516.jpg (132.57 KiB) Viewed 887 times
20220407_200100.jpg
20220407_200100.jpg (145.83 KiB) Viewed 887 times
User avatar
Lupask01
Posts: 28
Joined: Tue Aug 24, 2021 8:43 am
Location: Taiwan

Re: Rust or spider mites on Cleistocactus winterii?

Post by Lupask01 »

If I was you, I will cut the discolor part and keep the green part while changing the soil. After several days airdry, you can place it in fresh new-dry mixture, the roots will come shortly after (1 or 2 months).
This approach is one of the most simple and effective way to prevent the disease from spreading.
Good luck.
User avatar
Aeonium2003
Posts: 303
Joined: Sun Sep 26, 2021 2:53 am
Location: Central California

Re: Rust or spider mites on Cleistocactus winterii?

Post by Aeonium2003 »

I would suggest spraying it with a Hydrogen Peroxide solution.
User avatar
mikethecactusguy
Posts: 2173
Joined: Tue Jan 22, 2019 12:51 am
Location: Indio Ca
Contact:

Re: Rust or spider mites on Cleistocactus winterii?

Post by mikethecactusguy »

Hi.
Give this topic a read. Very helpful and it will answer all you questions. Not all sick plants need surgery as the only option.
viewtopic.php?t=42129
Mike The Cactus Guy
Enjoying the Spines
User avatar
MikeInOz
Posts: 479
Joined: Fri Feb 16, 2018 2:21 am
Location: Sth east Australia

Re: Rust or spider mites on Cleistocactus winterii?

Post by MikeInOz »

That looks like classic (old) mite damage to me. Not a disease.
User avatar
ohugal
Posts: 409
Joined: Sun Aug 18, 2019 10:45 am

Re: Rust or spider mites on Cleistocactus winterii?

Post by ohugal »

Aeonium2003 wrote: Thu Apr 28, 2022 3:03 pm I would suggest spraying it with a Hydrogen Peroxide solution.
In which cases do you use a HP solution and in what concentration?
Location
Antwerp, Belgium
temperate, maritime climate with mild winters and cool summers
hardiness zone 8a
Post Reply