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Posted 03 May 2022 - 09:50 PM
#2 looks like thrips possibly, maybe nute deficiency. The orange rust color could be fungal, too wet or humid. If you are on Facebook I highly recommend joining the Trichocereus Disease and Virology group. If you want I can post your pics there and see what the experts say and report back.
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I do not have Facebook. Well I did but registered an account just for Trichocereus and Peyote groups under a false name; I went to login one day and it asked me to upload a photo ID. I thought that was weird since you don't even need a photo ID to register for an account so I did not upload one and deactivated the account.
I can pretty much rule out the "too wet or humid" aspect. I watered them last in late October and then pulled my collection into the garage early November and forced dormancy for the winter. I just gave my collection a good watering for the first time since October and I live in a place that has an average humidity of 20-40%. Maybe under watering is a factor but I have done this same process for a few winters without issue; I suppose it doesn't rule it out though.
I just looked with one of those metal 30x - 21mm magnifying glasses at each cacti. I sat looking at individual spots for a couple minutes and did not see any notion of any movement or bugs.
Thanks for the reply. That cacti you grew from seed is nice!!
Edited by DetritusTheEgo, 03 May 2022 - 10:43 PM.
Posted 04 May 2022 - 04:55 PM
I've started to move my collection onto the covered patio after a winter of dormancy. Each day I am weening them outside gradually so they do not get any sunburn. I need to string up my shade cloth soon but today was overcast so they got to go out for a few hours into the sun.
When doing this I noticed that four cacti in my collection have something I did not see last season. Does anyone know what this might be? I assume cacti #2 and #3 are the same issue as it looks very similar. None of my other cuts that I've gotten from this mother, nor the mother, have this issue currently and these cuts have grown on their own for a few seasons. I have another cut of cacti #1 from the same vendor that does not have this issue as well.
I don't know if cacti #4 actually has an issue but I haven't seen spots like this on any of my other trichocereus cacti. I have inspected these and do not see any insects but am planning on keeping an eye on these closely in the upcoming weeks.
The pictures you provided are quite good to illustrate the damage. At first I thought some kind of skin infection rather than an insect infestation problem, but infections can begin with an insect as they damage the skin in order to feed. The insect may be gone, but the damage continues. Environmental would seem the most likely cause, but your description of humidity does not quite fit.
It's puzzling and I don't have a clear identification for you. Does it seem to be continuing to spread? how does the areas of yellowing skin feel to the touch? Soft and giving, or hard like the unaffected skin?
I suggest keeping these away from your other cactus for awhile until you can observe changes. Don't rule out an insect.
I am linking a page I think is a pretty good identifier of disease and cactus problems. It has visual pictures, not just description and also has treatment for each condition. You may want to save it for an identifier help, and possibly may help you with this as well.
If it is corking, you can't treat it as that is not a disease but still a condition.
https://cactiguide.c...ctipests/#frost
If this is a rot related problem, you need to save what is not affected but i would not start cutting your cactus without a positive ID of that, and a verification that it is spreading.
I hope this helps in any way and that you can get the problem remedied.
Posted 04 May 2022 - 10:51 PM
As a follow-up to my previous post, I went out and closely examined some of the bottom corking on a few of my 30+ year old San Pedro's, and the cork actually looks quite similar in position around the lower areoles, and in shape like a rounded edge extending around the area of the spines and connecting in places to the next spine or two.
I don't remember exactly what it looked like when it first started, many, many years ago, and it is now a hard grey cork surface. But the similarities would lead me to think that very well could be what you are seeing .
Posted 05 May 2022 - 05:01 PM
Posted 05 May 2022 - 06:16 PM
The cactus are looking pretty darn good Hr !!!
Posted 05 May 2022 - 10:39 PM
The pictures you provided are quite good to illustrate the damage. At first I thought some kind of skin infection rather than an insect infestation problem, but infections can begin with an insect as they damage the skin in order to feed. The insect may be gone, but the damage continues. Environmental would seem the most likely cause, but your description of humidity does not quite fit.
It's puzzling and I don't have a clear identification for you. Does it seem to be continuing to spread? how does the areas of yellowing skin feel to the touch? Soft and giving, or hard like the unaffected skin?
I suggest keeping these away from your other cactus for awhile until you can observe changes. Don't rule out an insect.
I am linking a page I think is a pretty good identifier of disease and cactus problems. It has visual pictures, not just description and also has treatment for each condition. You may want to save it for an identifier help, and possibly may help you with this as well.
If it is corking, you can't treat it as that is not a disease but still a condition.
https://cactiguide.c...ctipests/#frost
If this is a rot related problem, you need to save what is not affected but i would not start cutting your cactus without a positive ID of that, and a verification that it is spreading.
I hope this helps in any way and that you can get the problem remedied.
As a follow-up to my previous post, I went out and closely examined some of the bottom corking on a few of my 30+ year old San Pedro's, and the cork actually looks quite similar in position around the lower areoles, and in shape like a rounded edge extending around the area of the spines and connecting in places to the next spine or two.
I don't remember exactly what it looked like when it first started, many, many years ago, and it is now a hard grey cork surface. But the similarities would lead me to think that very well could be what you are seeing .
Thanks Skywatcher . I just noticed this early this week to be honest. I'll keep an eye out to see if anything worsens or spreads and keep using a magnifying glass looking for pests. I have done as you suggested and these are quarantined from the rest of my plants.
I touched the skin on the cacti and it felt slightly raised, bumpy, but firm. It was not mushy or spongy and it also doesn't smell abnormally. The damaged section is not as smooth as the sections that are not damaged, similar to others in my collection that had some type of physical damage done to them to cause scarring.
I'm loading up the link that you posted and will read through it as well as bookmark it. If corking is the issue then I'm perfectly okay with that. Insects, rot, and fungus was my biggest concern. I do already have other cuts of both of these so losing them wouldn't be a huge deal if it comes to that.
I appreciate your insight and taking time go inspect your collection for corking characteristics.
Posted 05 May 2022 - 10:44 PM
Edited by HrVanker, 05 May 2022 - 10:45 PM.
Posted 10 May 2022 - 11:34 AM
Posted 25 May 2022 - 12:15 AM
Posted 30 May 2022 - 04:04 PM
Posted 05 June 2022 - 08:53 PM
Thank you for the condolences!@HrVamker
Unbelievable what happened to your loph. I have a similar one that seems to be very sensible on its epidermis, for some reason I haven't found out yet.
Edited by HrVanker, 05 June 2022 - 08:54 PM.
Posted 06 June 2022 - 02:21 AM
Yum! I love jaboticabaJaboticaba
Posted 06 June 2022 - 02:27 AM
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