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Glatch
Stranger
Registered: 02/25/15
Posts: 8
Last seen: 8 years, 6 months
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Back Dots on bridgesii
#21559252 - 04/17/15 11:00 AM (9 years, 1 month ago) |
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Help!, Today I noticed a few groups of small black dots on my Bridgesii. I tried to wipe them of with my finger and gently with my nail but they won't come off.
Does anyone know what the spots are and how to get rid of them/prevent them?

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kactus.brand.g
Registered: 08/22/14
Posts: 6,886
Last seen: 7 years, 2 months
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Re: Back Dots on bridgesii [Re: Glatch]
#21559274 - 04/17/15 11:07 AM (9 years, 1 month ago) |
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Some kind of scale insects?
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Glatch
Stranger
Registered: 02/25/15
Posts: 8
Last seen: 8 years, 6 months
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I don't think its scale insects. I can't get it off,they don't move and also you nearly don't feel the dots
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El Torcho
Time for tea?



Registered: 04/16/15
Posts: 1,365
Loc: Lone Pine Hill
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Looks like insect damage. Thrips/mites/aphid/stinkbug maybe?
Looks like something has pierced the skin and those are 'scabs' of sorts. I've heard people mention similar issues when shipping poorly wrapped cuttings, from the spines hitting the cutting next to it and causing damage.
--------------------
"Well it sounds trivial, but the key insight is . . . . . you don't know shit" ~Dennis McKenna "There is more to human existence and to reality itself than science can ever give us access to." ~His Holiness, The 14th Dalai Lama
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karode13
Tāne Mahuta




Registered: 05/19/05
Posts: 15,290
Loc: LV-426
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Re: Back Dots on bridgesii [Re: Glatch]
#21560602 - 04/17/15 05:33 PM (9 years, 1 month ago) |
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The odd Black dot/spot is usually nothing to worry about and quite common. It will dry up and form a Brown scab in most instances. Nothing you can do about them and we don't have enough info to make an educated guess as to what's causing them. Sometimes there isn't a cause that can be pin pointed either. A picture would help, same with some plant history. How long have you had it? What season is it?
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ferrel_human
stone eater



Registered: 06/26/09
Posts: 16,574
Loc: Mexico
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Re: Back Dots on bridgesii [Re: karode13]
#21561426 - 04/17/15 09:27 PM (9 years, 1 month ago) |
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Quote:
karode13 said: The odd Black dot/spot is usually nothing to worry about and quite common. It will dry up and form a Brown scab in most instances. Nothing you can do about them and we don't have enough info to make an educated guess as to what's causing them. Sometimes there isn't a cause that can be pin pointed either. A picture would help, same with some plant history. How long have you had it? What season is it?
Thank you.
Go home bridgesii.
You're drunk.
-------------------- 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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Glatch
Stranger
Registered: 02/25/15
Posts: 8
Last seen: 8 years, 6 months
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I posted pictures in my initial post???
It is spring, I have had the plant for 1.5 years now( got it as a 12cm graft and is now about 30 cm ) I haven't noticed these dots last year. and they got out of hibernation 1.5 months ago, The cactus stands outside in a little greenhouse for 2 weeks now
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karode13
Tāne Mahuta




Registered: 05/19/05
Posts: 15,290
Loc: LV-426
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Re: Back Dots on bridgesii [Re: Glatch]
#21562276 - 04/18/15 05:01 AM (9 years, 1 month ago) |
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Ha. Sorry about the picture thing. I have adblock and I obviously didn't disable it to view the nice pictures you did post.
By what you describe it's probably sun damage due to it not being acclimatised to strong sunlight. It's only been outdoors for 2 weeks after all, not enough time to toughen up. Spots similar to these do crop up from time to time on these plants and they don't usually spread further, just clear up and blemish the plant. The undamaged portion continues to grow unaffected.
Some info on how sun damage occurs:
 
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