Vanda discoloration - Orchid Board

Nicolasdperez · #1 07-21-2021, 11:27 PM

Just looked at the back of my vanda and realized that these strange black/purple spots had become more numerous. Is this cause for concern?

estación seca · #2 07-22-2021, 12:02 AM

Does that side get more sun?

I would check for spider mites.

Nicolasdperez · #3 07-22-2021, 12:45 AM

Yes, this side is normally facing the window. I checked for spider mites but I cannot find any. Should I just spray with some isopropyl alcohol just in case?

---------- Post added at 08:43 PM ---------- Previous post was at 08:40 PM ----------

Actually, I just swabbed a bit of alcohol on the leaves and saw some little black bugs running around.

---------- Post added at 08:45 PM ---------- Previous post was at 08:43 PM ----------

I only noticed three at most, nothing serious

estación seca · #4 07-22-2021, 02:11 AM

I would spray it with a stiff stream of water in the shower. Do that once a week to prevent spider mites. That damage pattern can also be sun damage.

Nicolasdperez · #5 07-22-2021, 02:34 AM

One of my oncidiums has had spider mite damage and the while the color of the damage looks the same, it appears to be moist on the surface. This however, seems completely dry and seems more like a change in pigmentation as opposed to insect damage. I will spray it down and also try turning it around. Thank you for all of your help once again.