brown areas on the leaves

[nutgirl]

This is a Burrageara "Stefan Isler" that I've had for about 6 mos. About a month ago I noticed the tips of the leaves were turning brown and there were brown areas on the leaves. I cut them off.

The picture shows a cut leaf with new brown areas forming. I don't know if it's a reaction to the pruning or whatever this is is spreading.

The uncut leaf shows a brown area like the ones I noticed previously. It is dark brown with lighter areas around the edge. It appears to be spreading.

Any ideas? Treatments?

Maureen

[King_of_orchid_growing:)]

Looks bacterial.

Is the growing area clean? Are the plants crowded?

[nutgirl]

They're growing indoors for the winter on a wire shelf unit (top shelf) about 4"-6" between pots.

Good air flow in the room. Temps 60-70. 20-40% RH.

What can I do to treat bacterial infections?

Maureen

[mujacko2002]

Mabuhay!

Try spraying hydrogen peroxide.
goodluck

[King_of_orchid_growing:)]

Can you increase the day temperature to at least 80 F and the RH to somewhere around at least 60%?

Some people get humidifiers for the humidity issue, they're inexpensive ($25).

I'm not sure how you'd address your temperature issue.

Bacterial issue:

Sterilize the cutting tool and remove the infection. Burn the removed portion.

H2O2 can work too as was suggested. Gotta make sure the infections stop before you can stop applying.

[nutgirl]

Originally Posted by King_of_orchid_growing:)

Can you increase the day temperature to at least 80 F and the RH to somewhere around at least 60%?

Some people get humidifiers for the humidity issue, they're inexpensive ($25).

I'm not sure how you'd address your temperature issue.

Bacterial issue:

Sterilize the cutting tool and remove the infection. Burn the removed portion.

H2O2 can work too as was suggested. Gotta make sure the infections stop before you can stop applying.

I know, my RH is too low. I've been looking at the humidifiers - guess I better get one.

The temp is what it is.

I cut all the bad stuff off and treated the plant.
I sure hope this works and the crud doesn't spread to other 'chids.

Maureen