Garden Pests and Diseases: Disease on Jade Plant, 1 by NoH2O

NoH2O wrote:
A friend of mine is having a problem with his indoor jade plant. Below is his description of what is happening to it, along with pictures.

"Ok, here is the problem with the jade. The leaves start with a black scab. Then after about a week or so it gets a white fuzzy to the top of the leaves and the leaves drop a short time later. The plant has dropped more than half of it's leaves. I have attached a couple of photos.

This plant has been in the same location in the house for many years - at least 6 - I have not changed my care or watering schedule with this guy for years without any problems. I have another jade just below this plant and it too has just started to show signs of the same thing. I figure that it is a fungus of some kind."

Does anyone know what this might be and how to treat it? Any help would be greatly appreciated.

Thanks,
Candy

Picture #1