I can't tell what it is. You might check it against the funk on the C. tetragona in the post: http://forums.gardenweb.com/discussions/1827048/whats-the-funk-on-my-crassula-tetragona

it it took ages to figure out what was doing that. It was a tiny mite that Only ever with the macro on my camera- not the naked eye. It spread to other plants and killed this plant and an Aeonium before it was diagnosed. I'm sure it was present for 10 months or more. Bugs aren't always visible, and sometimes do weird damage.

well it is definitely humid here in the midatlantic and was a hot summer followed by heavy rain. Will remove all leaves, check for pests and repot, fingers crossed, thank you both.

It looks like it's probably very pretty when healthy. Bayer 3-in-1 cured my remaining plants. It's nasty stuff though. Good luck.

Thanks, removed the leaves and trying Bayer Tree & Shrub granular.

Just remember if it somehow survives and flowers to not leave outside. =)

I prefer the liquid form because then I know how long to keep my plant from pollinators (it's all released and absorbed by the plant immediately, not time release).

Ah good advice thanks so much!

Bayer Tree & Shrub contains only one active ingredient, imidacloprid 3% which is enormous quantity and doesn't treat anything except insects. It has no effect on mites, fungi, or other diseases.

Bayer 3-in-1 only contains about 1/2% imidacloprid, but also has tau-fluvalinate and tebuconazole which are an acaricide (kills mites) and a fungicide, respectively.

I think Bayer 3-in-1 in spray form is going to be much safer for the environment for the reason Kevin points out, and I think it will be far more likely to work on the plant. I really doubt the issue is just an insect (you'd see them). It seems more likely to be a mite and/or a fungal infection.

It is banned in some places, but I'm pretty sure that's because of the imidacloprid, so I think Tree and Shrub is banned in those places also.

Ah did not know this, I will get some 3 in 1 for sure, thank you!

Update, same plant, pruned all the leaves off, kept in greenhouse shady location overwinter. Much better!

That is great turnaround! Congratulation. Looks completely different from original - and very good. Nice, clean leaves.

Great recovery!

Did you treat with anything or just remove all the leaves? Looks great!

It looks great! Is that after Bayer 3-in-1? It's what rid my plants of a microscopic mite in 2014. It looked so much like yours before treatment. It hasn't been back since. I hope yours is gone permanently too. Such a lovely jade variety.

I did use the Bayer 3-in-1 after removing all the old leaves. So happy, I thought it was beyond help, thanks for all who gave advice! Much appreciated.

Excellent. Thanks for coming back and showing everyone your success. Are you saying that you stripped every leaf off and just left the stems?

Yes should have taken a pic of that but at the time I was not too hopeful to get such a good result.

My co-worker was having white fungus problems and considered pitching her large jade. I showed her this thread and she's now optimistic spray antifungal (sulfur) could work. She hasn't given up anymore!

Good, give it a try, isolate the plant. I have not tried it but have heard others recommend dusting cinnamon on the plant too.