Treating for diseases and pests in the house during winter

[Dimples]

Originally Posted by Girl_With_An_Orchid

Ray, is drenching the potting medium sufficient or is it better to repot? I was told that repotting was best in another post but that is a lot of potting material to go through. I was also wondering about the orchids that aren't showing any signs of the scale. They are not in contact with the infected plants. DO they need treatment too?

Repotting removes a potential reservoir of existing pests and eggs, and lets you see what’s going on with the roots. Repotting isn’t going to clear the infestation by itself. Some pests will be on the roots in addition to the leaves, so only treating the leaves would be useless. You only need to repot once, and then just drench/soak the medium in the pot with each additional treatment. No need to repot each plant three times with fresh medium.

If you’ve recently repotted any of your plants, you can probably skip repotting those right now.

[Girl_With_An_Orchid]

Well I was planning on repotting most of my orchids this spring anyway. I’ve gotten advice to drown the plants fully in water for 6-12 hours so I’m starting with that. Hopefully the lack of oxygen will work.