Uh-oh.(rings on flat surface of leaves)

[Bent55]

..... I'm getting rings that appear on leaves then leaf drop within 48 hours.... Help...!!!!!
Everybody was growing right along then I spotted this.... By the time I got back to take picture the leaf was on the ground. Next day a few leaves on another plant had.... And another.... Now I don't know what to do.

[AnonYMouse]

I see muppet faces.

Seriously, check here.

[Bent55]

Originally Posted by AnonYMouse

I see muppet faces.

Seriously, check here.

I looked at all that but didn't see anything like it.... Also I feel that the speed would be mentioned, I've had a nice happy orchid drop three leaves in three days. I feel like I've got orchid plague in my house.

[wintergirl]

The description of Bacterial Soft and Brown Rot - Erwinia more fits your plant when you read it. It has been hot and humid, which is something that helps this start.

(from the article)
Treatment: Immediately remove infected tissue using a sterile instrument, spray bactericides like Physan or copper compounds on infected and adjacent plants following label instructions (copper should not be used on dendrobiums or blooming plants), disinfect growing area with 10% bleach solution. Treat nearby plants as well as those that are diseased.

[Bent55]

Originally Posted by wintergirl

The description of Bacterial Soft and Brown Rot - Erwinia more fits your plant when you read it. It has been hot and humid, which is something that helps this start.

(from the article)
Treatment: Immediately remove infected tissue using a sterile instrument, spray bactericides like Physan or copper compounds on infected and adjacent plants following label instructions (copper should not be used on dendrobiums or blooming plants), disinfect growing area with 10% bleach solution. Treat nearby plants as well as those that are diseased.

Initially when reading that list I thought maybe that... But the plants aren't smelly and erwinia seems to really like Phalaenopsis..... But I had one of those right in the middle and it seems fine. I think the cut and physan is the approach I'm going to use though, at least physan is some hope.

[wintergirl]

Originally Posted by Bent55

Initially when reading that list I thought maybe that... But the plants aren't smelly and erwinia seems to really like Phalaenopsis..... But I had one of those right in the middle and it seems fine. I think the cut and physan is the approach I'm going to use though, at least physan is some hope.

That's what I would do, it seems like it is some form of fast growing bacterial rot. Hoping for a good outcome. Please keep us posted.

[Orchid Whisperer]

Every ring on a plant does not necessarily indicate a virus. Some may be fungal, possibly bacterial. The fast spread would make me suspect fungus or bacteria.

When you see it, cut off the affected leaf immediately. Use a sharp knife or razor blade, clean and flame-sterilize the blade (until red hot, then cool) between cuts.

If it is spreading rapidly plant-to-plant you might want to check your cultural practices and see if something needs improvement. Can you separate plants that show symptoms from healthy plants? Are you providing the right nutrients (not only N, P and K in the right balance but also Ca, Mg, S and micro nutrients)? Do watering practices need to be changed?

[judith_arquette]

Update?

[Bent55]

Originally Posted by judith_arquette

Update?

Still too early to tell but I'm getting more optimistic. Plus it only seems to hit dendrobium and bulbophyllum, it completely missed some other species that were right in the middle of the outbreak. Everybody is quarantined as much as possible in a big studio and after a twice a day trimming of any leaves that show the slightest hint of trouble and filling the whole house with a constant bath of physan we are trimming less leaves.... Or the plants are terrified of our rampage. So far I've only got one plant(a bulb. Makayanum) that I'll probably be tossing.... So maybe it'll be ok.

Edit: oh and for some reason it seemed to have hit a schefflera and a single one of several coleus growing near outbreak.

[judith_arquette]

Good to hear that it appears to be starting to improve. I hope things continue to get better