Please Help - What Is It on my Grammatophyllum leaves?

[TOMMYMIAMI]

Ok, so with growing collection and purchasing 80 plants in last 2 months I guess this was just about to happen any time. I have never had pretty much any issues prior to this summer. So please, help me, what is it on my Grammatophyllum leaves. They were fine the whole summer but this week I am starting to see some issues, and I do not see any SOB on the plant, so not sure what beast is causing this and HOW TO STOP IT. It somehow started to appear after I did remove the protective sun cloth that I had on thee front of the plant during the strong summer sun, I removed it some 2 weeks ago since I think the plant is already used to the full afternoon sun but this does not look like sunburn to me???

[IncurablePlantHead]

Yes, looks like sunburn to me. Even sun loving orchids must be slowly acclimated. I had the same thing happen to a large Onc. that I moved only 20 ft from one side of the tree to the other and I got burn that showed up within a couple weeks. It got over it but a few leaves did suffer.

[Island Girl]

^+1 Yep, I agree... Had that happen myself

[TOMMYMIAMI]

Ok, so it is sunburn. Should I cover it back with the shade cloth? I did remove it some 2 weeks ago and though it got acclimated to the sun already, plus ot is mostly raining here but maybe I should put it back? Or let it like it is and it will maybe loose few leaves, but stand it?

---------- Post added at 03:13 PM ---------- Previous post was at 03:11 PM ----------

The funny part is, the new growths all grew outside the shade cloth and were never ever covered, so they were actually growing from the beginning on the full sun. At least it is NOT some bug which I am scared of, I can deal with the sunburn:-)

[TOMMYMIAMI]

I did put the sunblock screen back:-)

[HighSeas]

Grammatophyllums notoriously get spots on their leaves especially in full sun...which they LOVE. Just call them "freckles".

I don't mind it so much as it's not very bad. Mine sits in full sun and three bulbs, each of which threw out really nice spikes, has now grown into a plant with 12 bulbs. Nine new ones are well on their way. I can't wait to see them show off in the spring!

[Bud]

aside from sunburn which the plant will get accustomed to, there are some evidence of insect suckers feasting on your leaves....the dark pinlike dots with yellow rings surrounding it means you had flying insect doing the deed and the fungi has set in....you need to spray that with big gun chemicals to deter bugs and liquid cinnamon(cinnamon extract) to kill the fungi....as long as the leaves still functions as maker of food for your plant =pls do not cut it for the sake of aesthetics....its best to have it looking ugly as long as its doing its job(it will drop off if its done being a leaf)

[TOMMYMIAMI]

Thanks bud, I did spray with your recommended solution immediately and put the protective sunshade back weeks ago, everything seems fine now, better actually no more signs of sunburn and neither spread of fungi or bucks bites. new growths grow in the speed of light, they doubled in size in 2 weeks:-)

[Bud]

Grammatophyllum is a very resilient plant, it can take so much abuse and stress but not frost....so your environment is conducive to growing this plant....other issues are just a piece of cake

[TOMMYMIAMI]

Yes, i read it can take anything except cold and frost, which really does not happen here in Miami. So it should have all it needs. There is so many new growths that it will truly eat that huge basket in no time. I wanna grow it without the sunscreen nest so I hope I will be able to remove it later, with fall coming the sun is moving as well and there is no direct sun now at 3pm but more at 4.15pm, so I guess in one month it will be safe to remove it and late afternoon won't burn it anymore.