Could it be Phyllosticta pad spots?

from net: These infections are caused by fungus spores that find a home on the agave plants. Use an anti-fungal agent occasionally to prevent infection. Destroy already infected plants to prevent spread.

Try a Bordeaux spray.A home made antifungal spray.Make sure to keep plant completely dry.No water at all.Good airflow.What kind of agave is it?

Mike, could you post a picture?

Seem to be getting it on all parryi types

Here on a leaf from a diff agave. They usually bleed a redish brown sap if i let them go much longer than this

Ouch, that looks scary. Thanks for posting the picture, I hope you can manage to save your plants.

A picture speaks a thousand words;).

I fight fungus all the time, in the summers especially. I get some gooey crud every year, and also the anthracose. And mold is now part of my house decoration. (not really!)

I use copper solution a lot. It works well on most of my fungal infections. Since wind will blow any spores, some of which I do not see, I spray all nearby plants whether they look infected or not. If infected, I cut off damaged leaves and spray the plant down. All my plants are outdoors, many planted in the ground. So I can't move them out of the sun and I can't keep them dry. None have been burned and the solution does not hurt the plants. I repeat after 4-5 days.

I don't always win the battle. And sometimes I don't try. These Aloe maculata are all infected, so I am pulling them all out.

I had treated this patch of Aloes last year. After the Hurricane Irma covered it up with leaves and palm tree boots, the fungus showed up everywhere. I uncovered a real mess. It was like an incubator. I'll pull them all and treat the area for the future.

And this Aloe dorotheae looked bad! I had some pups rooted, so I just replaced it.

I don't know if Anthracnose crosses species to infect. Maybe there are variants of the fungus. But virtually every mango tree in our neighborhood is infected. The fruit looks ugly, but it is edible. The trees are not huge and could be treated, but no one seems to bother.

Good luck with your battle! I do hope you can save your plants!

In your humid and summer-rain climate, a systemic fungicide applied as a root drench might be something I would do every spring for Agaves before the hot, humid weather arrives. Even if you keep the plants quite dry they are vulnerable in a humid summer. Avoid any physical wounds to the leaves where infections could enter, and certainly prevent any water from sitting in the foliage.

Does Captan stop those fungus from spreading? I use Sulfur sold for acid loving plants to control fungus as well.

I have some copper but lost the ticket for it and am not sure how to dilute it. Will have to look it up and see if any can be saved. a few of them have gotten much worse since that photo.

When I worked as an electrician, we used copper sulfate to kill weeds and all the plants in our transformer yards. Copper nails driven into trees also kills them. Copper is a strong anti-fungus but also kills plants. Agaves are tuff and thick leaved plants so I guess a small amount once may be good. I would be too afraid to use it.

Agree that the copper solution is pretty dilute. I bought the Southern Ag product, a liquid. It is 8% copper and I dilute that, one tablespoon to a gallon of water. The mix is a very pale blue.

I have sprayed the Agaves and also my Kalanchoe luciae with no damage. It didn't help the flapjacks because I really had scale! LOL

I just found out I cannot buy Captan in Florida, only professionals and farmers. How does Neem work on these fungi? It says fungicide on the bottle. I also thought it was iffy to use on succulents, but I don't know first hand.

I purchased my Captan on line in a pure mix. very strong and one pint bottle should last a life time. Said safe to use on fruit trees but I only use on house plants and very very dilute.

I cut off the most effected leaves and sprayed them down with a copper spray. hoping it stops the fungus but not really expecting much seeing how far gone they are. hoping being wintered inside will help and possibly another dose of copper later. thanks for the help everyone.