Are these insect bites or sun burns ?

[Clawhammer]

I had thrips in my grow room for about 18 months, but they mostly preferred cattleya and catasetum. Hard to deny the thrips diagnosis when you look at the pics in Camille's post.

I finally got rid of those horrible pests from hell by alternating sprayings of imidacloprid and pyrethrins every 3 days for 8 treatments (4 each pesticide).

Probably a little easier to treat phals, less places for them to utilize their hiding skills.