White leaves on dendrodium - Orchid Board

Saphire · #1 03-06-2023, 05:55 AM

I have 5 dendrodium, 2 are now dead but I don’t know what disease they have.
I am posting a photo of a leaf I have cut off, its silvery very rough and powdery. Any ideas on how to treat and what with.

White leaves on dendrodium-277816ab-132d-4acf-9ac7-1296b87dbb6e-jpg

Ray · #2 03-06-2023, 06:33 AM

Looks like a severe mite infestation.

Get a good miticide and closely follow the directions.

By the way, the genus is dendrobium

Saphire · #3 03-06-2023, 06:46 AM

Thank you, I will get some spray when I am out, I have been spelling the name wrong for a long while whoops

estación seca · #4 03-06-2023, 08:41 PM

Rubbing alcohol (isopropyl) 70% will kill the adults quickly. You must spray all surfaces of the leaves, the whole plant, the top of the medium and the pot. Do this as soon as you see evidence of mites.

Saphire · #5 03-07-2023, 06:27 AM

Quote:

Originally Posted by estación seca

Rubbing alcohol (isopropyl) 70% will kill the adults quickly. You must spray all surfaces of the leaves, the whole plant, the top of the medium and the pot. Do this as soon as you see evidence of mites.

Thank you I do have a bottle of this in my medical cabinet I will do that now outside. The smell is overpowering x