Cactus and Succulents forum→Possible issues with my mammillaria?

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Name: João V.
Lisbon - PT (Zone 10b)
Greetings from Portugal!
Image
Wallknocker
Apr 6, 2021 9:33 PM CST
Hey everyone!

I'm currently fighting off a fungus gnat infestation so I've been taking a closer look to my plants.

I've noticed a couple of things in my mammillaria elongata that are starting to concern me (that was actually one of the plants that was practically unaffected by the fungus gnats)

The first possible issue is these lighter spots. They are more prominent at the base but they are basically all over the plant, in the "ridges". They are hard to reach because of the spines but it doesn't seem like it can be scraped off. The mammillaria was really close to other cactus but none other is developing this.


Thumb of 2021-04-07/Wallknocker/381f2b
The base

Thumb of 2021-04-07/Wallknocker/f1f8c4

Other possible issue, that is concerning me more, is possible rot. I removed last year's dead flowers mid March (and now I'm unsure if I should have). Most of the spots are fine but two now present a gooey substance. I am afraid I might have damaged the flesh while removing the flowers (used a pair of tweezers) and now it is rotting or simply not healing


Thumb of 2021-04-07/Wallknocker/e7298b


Thumb of 2021-04-07/Wallknocker/62c14b


I tried my best to capture these in the pictures, but if it is not clear I can try again tomorrow with natural light.
These were taken with a macro lense so zooming in might help.

Any idea if these are cause to concern? And of so how can I treat them? Confused

Thank you!
(Sorry for any eventual bad english! ^^")
Name: João V.
Lisbon - PT (Zone 10b)
Greetings from Portugal!
Image
Wallknocker
Apr 7, 2021 8:18 AM CST
Yep that looks even worse in the daylight Crying


Thumb of 2021-04-07/Wallknocker/094f9c


Thumb of 2021-04-07/Wallknocker/a8366b

(Sorry for any eventual bad english! ^^")
Name: Donald
Eastland county, Texas (Zone 8a)
Region: Texas Enjoys or suffers hot summers Raises cows Plant Identifier
Image
needrain
Apr 7, 2021 10:00 AM CST
I'm growing the same Mamm. Looking at your photos, if it were mine I just watch it for a while and be careful about giving it water. Sun and air circulation would help. If the spot clearly begins to spread rapidly, then I might consider some amputation. Based on what I see, I really think the spots will dry up and just leave a small scar. Your climate should be about ideal for it, I would think.
Donald
Name: João V.
Lisbon - PT (Zone 10b)
Greetings from Portugal!
Image
Wallknocker
Apr 8, 2021 9:14 AM CST
Thank you! Thank You!
I will keep an eye on it.
Any idea about the lighter spots at the base? I'm just afraid it might be scale or something but as I've never seen it IRL, I am not so sure about it. It also might be just regular corking but it seems kinda off...
(Sorry for any eventual bad english! ^^")
Name: Donald
Eastland county, Texas (Zone 8a)
Region: Texas Enjoys or suffers hot summers Raises cows Plant Identifier
Image
needrain
Apr 8, 2021 9:53 AM CST
Put up a photo of the base. I can't tell what the white might be in these photos. Discoloring of the skin on plants can be caused by several things, insect pests being one. Stink bugs have attacked some of my plants the last several summers and where they punctured the skin to feed, it left lighter color areas around the punctures. From what I can see, yours doesn't quite match that. Chemical sprays can leave a fine network of scarring from the mist. Some plants are more sensitive to chemicals than others.
Donald
Name: João V.
Lisbon - PT (Zone 10b)
Greetings from Portugal!
Image
Wallknocker
Apr 8, 2021 11:06 AM CST
Let's see if these are better than the one I posted. The spines make it a little tricky. Again these were taken with a macro, so zooming in really helps.

I just find wierd that in 14 cactus placed really close to each other, this is the only one with these marks. Also they were never sprayed with anything... Confused



Thumb of 2021-04-08/Wallknocker/dab00f
Thumb of 2021-04-08/Wallknocker/74fb59


(Sorry for any eventual bad english! ^^")
Name: Donald
Eastland county, Texas (Zone 8a)
Region: Texas Enjoys or suffers hot summers Raises cows Plant Identifier
Image
needrain
Apr 8, 2021 12:43 PM CST
I'm sorry, I just can't tell. Maybe scale or maybe mealybugs, but I couldn't really guess either one.

As for spraying, don't discount drift if they are where a neighbor might have sprayed unknown to you. Chemicals can travel further than you think when the fine particles get airborne. Inside that could be something as innocuous and air freshener or disinfectant spray.. Not saying that's what it is by any means, but it's something that sneak in when you don't expect it.
Donald
Name: João V.
Lisbon - PT (Zone 10b)
Greetings from Portugal!
Image
Wallknocker
Apr 8, 2021 2:43 PM CST
What a bummer. It is really unlikely to be something sprayed, so I guess it must be some kind of pest. And this one will be hard to get cleaned because of the spines... I'll keep an eye on it to see what I can do.

Thank you!
(Sorry for any eventual bad english! ^^")

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