Thank you Steve. I just went through your stick post - awesome... so helpful. Yes, it is the mites. The climate here around the time this attack occurred (rainy/winter season) is 25-30C, unusually dry this year. Coastal town with very high humidity. This according to your post points to flat mites. ...

Yes, the elongate lesions are firm.

Harald, thank you very much for your response. Indeed the one which you identified as due to mechanical injury did suffer some scratches. Only previously such abrasions, pricks, scrapes would result in dead skin but of a less white color..more dull cream. This time its bright (on a few other grusoni...

Two of my fairy castle plants (residing in a glass house) have turned brownish (see pics in link below). They were a nice shiny green when i purchased them. A year later they are changing color. I water every two weeks in this cooler season, and once a week in the hotter months. Here its hot and hum...

I have four fairy castle plants in 6 inch clay pots. Two of them developed this - seems like a fungus. It shows up on the apex first. makes the skin look dry and the plant loses its greenish sheen. Does anyone have experience with this? How to treat it? The other two are turning brown/pale browish r...

A few of my Grusonii developed white dots and rashes while I was away for a month. Posting pictures of two different plants. The plants are about a foot wide and a bit longer, more than 10 years old. One has just white/dry-skin spots right now, the other a bigger patch of what looks like dry skin. T...

Eye-opener. I will have to pay a visit there soon.
I know this is an ancient post, but ...
What is the variety in pic 204? I have it and dont know the name.

Never bloomed so far, so not aware of flower details.

About 4-5 inches tall, 2-3 inches wide Taller ... maybe 5-6 inches, but markedly thinner.. perhaps cos two growing in one pot?

This is about 7-8 inches tall and 4-5 inches diameter-wise.
other about 5-6 inches tall.

Inherited these two, that Google image searching hasnt led to me a positive identification of. Thanks for helping.. Cacti in background for the first picture are not same variety as the one I am trying to identify (since compressed image quality is low) IMG_9641__resized.jpg IMG_9642__resized.jpg IM...

Thanks a lot Greenknight. Changed it to a deeper smaller pot, befitting its size. Also added more gravel to the mix. If it does recover, I will post a pic and thank again

Thank you very much Steve. That is indeed very helpful.

Inherited this cactus which was potted in a clay bowl-pot too large for it. What do you think is the problem? Is it overwatering/wetness? The white spots were scales, i removed them a toothbrush and sprayed insecticide. Lives in a glasshouse, humid climate, high temps of India. Also any id on what c...

Depends on what you're calling "sand" -- if it's so fine that it'll clump up in your fist, you'll have a lot of trouble growing anything with it in a mix. Pumice gravel (AKA horticultural pumice) is excellent, although I don't know if you can find it in your part of India. If you can't, t...

Thanks guys... when i took it out of the pot, the soil was damp, and had a more clayey/soil look than porous. So I am thinking its from overwatering/dampness. Its quite firm as of now, so hoping it will take new roots if I rehabilitate it in some sand. Will let you know how it turns out. Thanks for ...