What exactly are the light spots.

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Brontosaurus
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Joined: Mon Sep 12, 2016 5:49 pm

What exactly are the light spots.

Post by Brontosaurus »

I would assume they have something to do with lack of light and/or corking, but somebody asked me about them yesterday and I honestly have never thought about it before.
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DaveW
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Location: Nottingham, England/UK

Re: What exactly are the light spots.

Post by DaveW »

Looks like burn marks from hot sun? You can conversely get similar "burning" from cold in winter.
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samhain
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Location: Lucerne valley, ca

Re: What exactly are the light spots.

Post by samhain »

Pictures not the best but looks similar to variegation
15F-110F. 14” annual rainfall. 8b. 3000’
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7george
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Re: What exactly are the light spots.

Post by 7george »

samhain wrote: ↑Fri May 08, 2020 8:31 pm Pictures not the best but looks similar to variegation
This is my suggestion too.
If your cacti mess in your job just forget about the job.
°C = (°F - 32)/1.8
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hegar
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Re: What exactly are the light spots.

Post by hegar »

On a fact sheet published by the British Cactus & Succulent Society there are two images, which do not look too different from the one showing on your plant. The diagnosis there is: Mineral- or nutrient deficiency, e.g. Magnesium deficiency. Manganese deficiency also causes yellow spots.
Other causes of lesions could be due to insect feeding, e.g. leaf-footed plant bug of the insect family Coreidae or eriophyid mite feeding damage.

Harald
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