What disease is this on my phalaenopsis?

[Wizzadora]

I’ve had these orchids for nearly 10 years and they’ve always been happy but these bumps appeared about 6 months ago. Not sure if this is relevant but this is also the first year that I didn't repot them since I got them.

Apart from these bumps they also seem to have a sticky substance on the leaves and have been very slow to bloom this year. Normally they stay in bloom for a long time with lots of flowers.

I keep them by a big window in the bathroom and they have always been happy till now. Any idea what it is?

Orchid - Google Photos

[Ray]

Brown scale.

Their shells protect them from most topical insecticides, so a systemic or translaminar one is best for eradicating them.

3 thorough treatments at 1-week intervals.

[Wizzadora]

Thanks. Should I repot them now or after the treatment? Will repoting help with bugs?

[Ray]

The best time to repot is when the plant is producing new roots. That is unrelated to the insect infestation.

[estación seca]

You almost certainly have scale on all your other house plants. Get out a magnifying glass and take a look.

[Toadwally]

Originally Posted by estación seca

You almost certainly have scale on all your other house plants. Get out a magnifying glass and take a look.

I would take that advice.