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Offlinepinedownpioneer
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Hopefully someone can help
    #23558431 - 08/19/16 09:39 PM (7 years, 5 months ago)

Ethnobotanical brain trust enlightenment needed.
Been growing cacti 7-8 years, every year has gotten better and better until this year.  A strange sickness has started to overtake the garden, it seems to have picked up pace significantly in the last month and spread to new cacti.  Repotted all the cacti in a mixture of perlite, coarse sand, composted cow manure, soil, and just a touch of lime this spring.  Watering, feeding, sun has all been at regular intervals as it has in the past. (Though a large amount of rain the past few days.)
Also it seems this year many of my new repotting of established plants and cuttings have no back bone and are flopping over.  I'm not so much worried about that as I am this sickness.  It's a light brown/tan scabbing that is growing on the lower 2/3 of the plant.  This scabbing is random, growing, hard (cannot readily be scrapped off and when so it exposes raw green cactus flesh). The cactus are not plump frim but they are not overly squishy in these areas.  So far none of the pedro have died but I feel it is coming.  One achuma 1 or 2 years ago developed something akin to this and died. Now another got the same achuma sickness and is near dead. 
I have sprayed with insect neem oil a few times.  The other day I saw 1 tiny bug that might have been a Miterrible but other than that I cannot see any insects.  On a positive note my kratom tree and cuttings are doing great.


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Invisiblethe_r3dz
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Re: Hopefully someone can help [Re: pinedownpioneer]
    #23558444 - 08/19/16 09:42 PM (7 years, 5 months ago)

It looks like they got sprayed with something nasty!
Have you sprayed any chemicals around them or anything?

That bridgesii stand is absolutely amazing! I'm sorry that you're having such troubles


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Offlinepinedownpioneer
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Re: Hopefully someone can help [Re: the_r3dz]
    #23558474 - 08/19/16 09:53 PM (7 years, 5 months ago)

No chemicals, besides the neem oil a few times.  It's been getting worse over time.  The bridgesii is my favorite, grew it from seed.  The plague is starting to infect it as you can see in the picture, it was not there a week ago.


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Invisiblethe_r3dz
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Re: Hopefully someone can help [Re: pinedownpioneer]
    #23558479 - 08/19/16 09:54 PM (7 years, 5 months ago)

I've heard that if you use neem oil during the day it can burn your plants
and that there are two types of neem and one of them also burns trichs

I'll look into it a bit deeper and try to find the specifics


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Offlinepinedownpioneer
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Re: Hopefully someone can help [Re: the_r3dz]
    #23558497 - 08/19/16 10:03 PM (7 years, 5 months ago)

Applied the neem at dusk each time with proper concentration.  I sprayed them because of the brown infection, definitely not chemical burn.  Never had anything like this before.  The other types of cacti, succulents, palms, kratom, fruit trees, oak trees, garden veggies are  healthy. Only the bridgesii, pedros, Peruvians are in trouble.


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OfflinetheMallacht
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Re: Hopefully someone can help [Re: pinedownpioneer]
    #23558527 - 08/19/16 10:14 PM (7 years, 5 months ago)

Yes definitely don't spray Neem during the day. This looks like it could be spider mite damage. I'd like someone else to confirm, but in the meantime are you sure you don't see tiny little bugs? Look with a magnifying glass if you've got one handy.


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Offlinepinedownpioneer
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Re: Hopefully someone can help [Re: theMallacht]
    #23558547 - 08/19/16 10:20 PM (7 years, 5 months ago)

I'll check tomorrow, I have a magnifying glass. If I do seem them how do I go about getting rid of them? All in all there's 60+ pedros, bridgesii, torches.  Have yet to taste the fruit of my labors even after all these years of cultivation.


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OfflinetheMallacht
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Re: Hopefully someone can help [Re: pinedownpioneer]
    #23558566 - 08/19/16 10:27 PM (7 years, 5 months ago)

I would start off by spraying the sides of them as hard as possible with the hose to try to physically dislodge the majority of them. Then, as r3dz said spray your Neem when the sun isn't up. I like doing it right after nightfall that way it's a little cooler and the spray doesn't evaporate right away.


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Invisibleferrel_human
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Re: Hopefully someone can help [Re: theMallacht]
    #23558579 - 08/19/16 10:30 PM (7 years, 5 months ago)

I dont know but ive had bridgesii go theough the same and just grow out of it. Even my in ground TBM got it and the. It just went away. Ive found you cant do anything really. If you see no bugs that shit is internal.


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Nature is my church and walking through it is gospel. It tells no lies and reveals all to those who look, and listen, closely.
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OfflinetheMallacht
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Re: Hopefully someone can help [Re: ferrel_human]
    #23558591 - 08/19/16 10:33 PM (7 years, 5 months ago)

Yeah I agree. Definitely make sure you actually see the bugs before using any kind of insecticide. Even something as supposedly benign as Neem. Cacti skin tends to be very sensitive, oftentimes sprays do more harm than good.


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Offlinepinedownpioneer
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Re: Hopefully someone can help [Re: theMallacht]
    #23558620 - 08/19/16 10:40 PM (7 years, 5 months ago)

I've sprayed them a few times awhile back.  It might have slowed down just a little but in the past few weeks it's gotten worse.  I'll take a glass to them tomorrow and peep it out then spray accordingly.  Does anyone with experience have any recommendations as to the best insecticide.  I don't care what the price tag, I need these babies healthy before I sow a TON of seeds.


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Invisibleferrel_human
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Re: Hopefully someone can help [Re: pinedownpioneer]
    #23558633 - 08/19/16 10:44 PM (7 years, 5 months ago)

Use insecticidal soap. That usually cures things around here. I use the safe brand soap. Yoi can find it at walmart and if not lowes or home depot. I cured some whiteflies and those asian psyllids on my citrus tree if that helps. But be smart about it. Use late in the day and do a small area.


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Nature is my church and walking through it is gospel. It tells no lies and reveals all to those who look, and listen, closely.
-Karode


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InvisibleMethadone
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Re: Hopefully someone can help [Re: ferrel_human]
    #23558780 - 08/19/16 11:44 PM (7 years, 5 months ago)

I got similar burn on my plants once from using neem. I've never seen spider mites attack old growth like that but leave new growth alone, every time I've seen them they always seem to prefer the soft new growth. I've seen scale do that from systemic infection but I dont see any on your plants. Regardless, the fact that it appeared and has spread to other plants in recent months would raise concern.

If it is spider mites I always used Bayer Systemic insecticide. Every other pest I've encountered I could manage with soap or oil but spider mites required the heavy artillery.

Have you transplanted all of the scarred specimens recently? The spines will wound them like that and theyll cork over.


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OfflineSpanishfly
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Re: Hopefully someone can help [Re: Methadone]
    #23559103 - 08/20/16 03:50 AM (7 years, 5 months ago)

Like people, cacti can catch viruses.  And like people, some they can recover from, some not.
I must confess I have never seen anything quite like this.  My commiserations - hope they get better.


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I am currently BANNED from using Private Messages - so can anyone who wants to contact me do it via my Journal thread.  Link is https://www.shroomery.org/forums/showflat.php/Number/23831115

Maybe some mod or whatever might think this has now been long enough.


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Offlinepinedownpioneer
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Re: Hopefully someone can help [Re: Spanishfly]
    #23561023 - 08/20/16 07:33 PM (7 years, 5 months ago)

Made a couple hour trip today to the cactus king.  He said it looks like a fungus due to stink bugs.


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Invisibleferrel_human
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Re: Hopefully someone can help [Re: pinedownpioneer]
    #23561136 - 08/20/16 08:00 PM (7 years, 5 months ago)

Cactus king?


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Nature is my church and walking through it is gospel. It tells no lies and reveals all to those who look, and listen, closely.
-Karode


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OfflineSpanishfly
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Re: Hopefully someone can help [Re: ferrel_human]
    #23562211 - 08/21/16 06:31 AM (7 years, 5 months ago)

Fungus? Virus?  OK so what is the owner going to do about it??


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I am currently BANNED from using Private Messages - so can anyone who wants to contact me do it via my Journal thread.  Link is https://www.shroomery.org/forums/showflat.php/Number/23831115

Maybe some mod or whatever might think this has now been long enough.


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Offlinepinedownpioneer
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Re: Hopefully someone can help [Re: Spanishfly]
    #23562597 - 08/21/16 10:34 AM (7 years, 5 months ago)

Large cactus center in Houston..talked to the owner hes been cultivating since 83'..talk about a ton of cacti.  Basically stink bugs took shits in my cactus when I took cutting and repotted and combined with an extreme amount of rain the fungus is amoung us.  That's what he thinks without seeing it 1st hand.  Systematic bacterial, fungus, insect, killers will be used.  Basically bring out the heavy stuff..I have nothing to lose.


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OfflineSpanishfly
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Re: Hopefully someone can help [Re: pinedownpioneer]
    #23565038 - 08/22/16 04:35 AM (7 years, 5 months ago)

Quote:

pinedownpioneer said:
Large cactus center in Houston..talked to the owner hes been cultivating since 83'..talk about a ton of cacti.  Basically stink bugs took shits in my cactus when I took cutting and repotted and combined with an extreme amount of rain the fungus is amoung us.  That's what he thinks without seeing it 1st hand.  Systematic bacterial, fungus, insect, killers will be used.  Basically bring out the heavy stuff..I have nothing to lose.




Never seen anything quite like this. Do let us know how you get on, but I am not hopeful.


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I am currently BANNED from using Private Messages - so can anyone who wants to contact me do it via my Journal thread.  Link is https://www.shroomery.org/forums/showflat.php/Number/23831115

Maybe some mod or whatever might think this has now been long enough.


Edited by Spanishfly (08/22/16 05:15 AM)


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OfflineLSoares
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Re: Hopefully someone can help [Re: Spanishfly] * 1
    #23565052 - 08/22/16 04:57 AM (7 years, 5 months ago)

Applying a cure for everything that may be is a sure recipe for disaster, now or in the near future. When a disease hits that hard, seldom will a single application of a remedy solve the problem - what are you going to do, keep applying insecticides, fungicides, miticides, etc. until everything clears? You'll be creating a whole new set of problems for you and your neighbours.

First things first: isolate the affected plants from the general population. You don't want it spreading around, and if it turns out you can't fight and plants will die ([sh]it happens), at least you will have salvaged something.

Second, decide on a possible cause and treat for it. Do you and your friend think fungal? Good, go for it. But remember that when you say "a fungus did this" is more or less the same as saying "an animal did this" - it could be a mouse, a worm, a mite or an insect. Each organism has a very specific sensitivity, and fungi are no different. Try taking a plant or some pictures to a specialized agricultural supplies shop and talk to the guy in charge of the chemicals, maybe he knows of a "broad spectrum" product you can use. If it is fungal, you may have to try a good number of products before you hit the right one (supposing you ever will).

If it was me, I'd probably destroy (read: burn) the affected plants and improve growing conditions. If some days of rain bring an outburst such as this to your collection, you are missing on sheltering and ventilation. Eventually think about spacing the plants apart, to minimize contagion possibility.

I'm sorry if I sound harsh and bring no good news, but sometimes you have to sacrifice a part of your collection to save the rest.

Good luck.

(have you cut through an affected stem? Is it exclusively superficial or has it spread into the core of the plants?)


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Z. in sunny Lisbon, Portugal
Cactus grower particularly fond of north american miniatures.
http://jardineiroazelha.blogspot.pt/

Sowing cacti - my way!
Random pictures of my collection.
Photographing cacti, Z's way.


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