New Miltassia Golden Spider, leaves with yellow spots from middle

[Streaming]

I got this Miltassia Golden Spider a couple of weeks ago. Starting a few days ago I noticed the leaves developing these yellow spots (very light) starting on the underside. It's spread and gotten more dramatic over the last few days and now they're easily noticable from the top of the leaves.

The roots look pretty good from what I can see. Any ideas? Is it a virus?






One of the leaves also has very minor pitting

[estación seca]

Welcome to the Orchid Board.

What are your growing conditions? Temperature, light, humidity? How are you watering?

Some Miltassias prefer high humidity and cool temperatures. Typical room temperatures are usually good, but winter heating leads to very low humidity. I suspect the problem you see is related to low humidity and underwatering.

[Streaming]

Originally Posted by estación seca

Welcome to the Orchid Board.

What are your growing conditions? Temperature, light, humidity? How are you watering?

Some Miltassias prefer high humidity and cool temperatures. Typical room temperatures are usually good, but winter heating leads to very low humidity. I suspect the problem you see is related to low humidity and underwatering.

Thanks! It's on an east facing window behind another plant. My house ranges from 60-70 (no heat) with humidity between 40-55. I water when the medium is about halfway dry. I've been using about 1/4th diluted fertilizer.

[rbarata]

I have seem a similar pattern in one of my Oncidiums...could never determine what was happening and it disapeared without any intervention from my side.