Agaveville

Hi everyone, my dad and I have an extensive agave collection and think a recent addition brought a pest into the garden. This is the latest victim, an Agave azurea. It seems the disease starts in one spot then spreads on that leaf before spreading to surrounding leaves and eventually killing the plant. Can anyone assist in identification and possible remedies? It has spread to 20 plants so we are getting concerned and have had no luck controlling it yet.

Any help is much appreciated!

Possibly Cercospora agavicola

The images for the damage that Cercospora causes are interesting and it leads me to think that that is what was affecting my Weberi's at my old place - I did not take any of those with me and since then I have not seen anything similar affecting my other Agaves and it seemed very particular to my weberis and not my other Agaves, so maybe not.

To me the damage to the plant in the picture looks like some kind of antracnose fungal damage related to high humidity and generally wet soil, but I guess it is just another fungus... there are some reasonably effective fungicides available, spores tend to distribute through wind or water splashing so isolate and separate any affected plants asap and treat the s$#t out of all the plants.