The National meeting for The AHS (American Hemerocallis Society) was held in Hattiesburg Ms. two years ago. A a few of our local club members and I attended. Yes that is a daylily meeting, but on the way back home we stopped at a garden of a man that grew daylilies, and camellias his wife had grown Amaryllis before she passed away. He was an older man maybe 90, and we enjoyed the visit very much.
Later our local botanical garden announced that it wanted to start up a new area of the gardens and feature Amaryllis, they might have called them Hippestrum, I don't recall. Any how the older gentleman from Mississippi heard about it and let us know that he would love to donate some of the Amaryllis previously grown by his wife.
I was told the Hattiesburg daylily club often helped him with his daylilies and they have a great relationship with him. They called our club and let us know that they had dug those Amaryllis and one of our members met them and brought the bulbs back. I then picked up the bulbs, took them home and sorted them by size. Two club members came over to my garage and we potted up all those bulbs. We ended up with three rows of "larger" pots and three rows of the small trade one gallon pots. I did not actually plant all those pots in the ground like I do a lot of my potted daylilies, but just used leaves to bury the pots about three quarters of the way.
Now nearly all of the pots are showing signs of new leaves, some are even showing new stalks. The botanical garden wants all the plants to bloom first before they have us plant them in the new bed they will build (soon I hope) so they can plant them by color being none of the bulbs were labeled. So I hope to be showing bloom photos soon and will appreciate any help in trying to get some of them identified.
Hopefully I will be able to get more help from the man who donated the plants also.
I have grown Amaryllis (pass along) for years but now I feel growing these for the botanical gardens I need to step up my game a bit. So I am open for any suggestions, tips and especially disease info. I have noticed over the past few years my on have shown signs of red blotch, but I never bothered to treat them. I am already seeing some sign of red here and there on the newly received plants, but I know that in itself is not a sign of red blotch but I am watching for it. Has anyone tried treating Amaryllis with Daconil or Azoxystrobin, two chemicals I used on daylilies for rust and leafstreak?
Three rows of larger pots:

Three rows of small pots:

Other photos of the pots.

Larry, that is certainly a huge undertaking. Maybe someone on this forum has experience with disease treatment using commercial products.

Yes, a huge project! You need more help (see below.)

If it is red blotch, Stagonospora Curtisii, it's difficult to control. And as you know, any damage (mechanical or insect/disease) can show as red splotches on Hippeastrum.

It can infect related plants nearby, (daylilies?) carried by insects such as mites or wind and rain or irrigation, and find entrance into cell tissue via insect or mechanical damage.

Here is a link from a University of Florida article- look in the 'disease' section. Realize, though, that when they say treatment is to expensive, they are usually meaning "for your one infected bulb you bought at Christmas- treatment is expensive. Discard it."
You, however, are taking about many bulbs... this context is important.

https://edis.ifas.ufl.edu/publ...

Here is a link from the Pacific Bulb Society about it, discussing bulb dips and chemical treatment. This would be prior to planting again.
https://www.pacificbulbsociety...

YOU NEED MORE HELP!
I would run (not walk) ASAP to your local county agricultural extension office (connected to the land-grant university of your state) and propose a mutually beneficial partnership in this endeavor.

They could help you and your club & the garden by:
1) identifing conclusively if it is indeed red blotch
2) recommend treatment options,
3) recommend preventative options, once planted, for both the Hippeastrums and those items planted around them
3) if willing, help your club and the botanical garden with all the labor- planting and identification and labeling, using their network of Master Gardener volunteers ( who need service hours) - if they have this set up.
4) provide ongoing care of final bed- doing everything in point #3 above.

If they aren't interested in this community/non-profit project, at the least they might diagnosis the red blotch cases for certain, FOR FREE, and recommend a treatment. Extensions usually charge local farmers for this service, but it seems like a public university charging a local non-profit club and botanical garden for its help would get many people a bit upset.

Regardless, assume all of the bulbs may be infected, not just those showing signs.

I'm no expert in hippeastrums, but I congratulate you on your efforts so far, and you have made educated decisions that seem very appropriate to me. An actual bulb society like the Pacific Bulb Society might point you in a good direction, and might have some local members that might jump in with you on this project.
Good luck going forward- and I hope you get the help you need!

Once they start to bloom, posting photos here is a good way to get possible ID's from the Hippy detectives here!

The pots for the Botanical gardens had the first bloom today. I looked at all the potted amaryllis for the botanical gardens closely today and I saw none that looked like they had red blotch. I think what I saw originally was just some damage from the digging and transplanting.
This first bloom has some freeze damage on it, the second bud on the scape I hope will be clear of any damage when it blooms.

I had the first blooms on my own amaryllis yesterday:


I have lots more that are getting near bloom stage. These are well established Amaryllis that have been in the ground for years. I divided some this past fall and they are just beginning to show some foliage, but looks like at least most of them survived the temps down in the teens. I did plant them deep and I think that protected them.