Cattleya Leaf Discoloration.

[Gthumbz89]

Hello All!! I have been having problems with my cattleya leaves lately . I don't know if it is sunburn, fungus or rot. A couple of months ago I moved my super bright LED light closer to the plants, and I see there are some purple tinges to the leaves. Could this yellowing be Sunburn???

Sorry for the blurry photos. If necessary I can get my dad's camera instead of using my ancient cell phone.

Thanks,

Collin.

[orchids44]

Yes, the leaves look like they're getting too much light, especially the yellowish one.

[Hiester]

Hmmm... I dunno. That yellowing leaf doesn't quite look like typical sunburn to me. How old is that leaf? Could this be normal abscission of an old leaf? If not, there might be another cause.

[HighSeas]

Really can't tell by these pics. Any chance of getting a shot of the whole plant?

[james mickelso]

Leaves yellow for different reasons. That may be due to high light levels. That may be due to a viral attak. In the second picture, although it is very poor quality, the spots I see could be one of many fungal types. Guignardia starts with small spots which coalesce into larger areas. Clearer pictures would help. I've had cattleyas and laelias which showed discoloration of the leaves which were mere discoloration and then had the same thing happen and the leaf eventually turned completely yellow and then dried up and fell off. I had leaves which yellowed and then the yellowing went right down the pbulb, and then attacked the rest of the plant. Many different types of conditions all starting with the same appearance.

[Gthumbz89]

Originally Posted by orchids44

Yes, the leaves look like they're getting too much light, especially the yellowish one.

Here are some better pictures with my dad's camera. I want to say that those spots are anthocyanin purple freckles from light because I religiously spray with physan 20, but it is possible that I am wrong.

Those are some old leaves. By now they are over a year old with the exception of the severely freckled one.

With these pictures what do you all think??

[Gthumbz89]

Oops I forgot to post another pic of the freckles.

Here it is plus some pictures of another mini-catt that I have been having issues with the leaves.

[HighSeas]

If you're sure you haven't watered your plants with softened water, I'd first try giving it some Cal-Mag. I noticed in one picture that many of the leaf tips have been snipped off. Watering with cold water will also have this type of effect.

The "freckles"....are they a rust color? If so, treat for mites. I sure hope that helps....but if not please do come back and lets all have another look at it. Good luck!

[King_of_orchid_growing:)]

It's a bit too bright. I recommend putting the lights back up to where it was before.

I don't know if it's me or not, but the pot seems to have very little potting media in it.

[Fairorchids]

The purple pigmentation is an indication that the plant is getting max light level (which is OK for Catts).

I currently have my reed stem Epis outdoors in full sun light, together with my Aussie Dendrobiums. Epis are getting purple, Dendrobiums are not.