Pests and Diseases forum→Got rid of one pest - and now another?

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Mar 14, 2021 3:01 PM CST
Hello. First off, I'm a novice gardener. I have a bunch of African violets around the house and a odd mix of other plants, but I am still very new to the world of gardening - especially indoors.

I am located in Montana. I have a Meyer lemon tree that was bought at a local greenhouse last summer (June?). While it was outside while the nights were still night, then moved indoors/outdoors based on weather, and finally inside when the weather was too cold. It has a lamp to provided adequate light as well as a heat lamp to keep it warm when the fireplace goes out.

I mistook the shiney leaves and scaley appearance of the bark as a normal progression of the plant growing. (In retrospect, facepalm) Only when I noticed that leaves were dropping it I realize that the plant had been overtaken by scale (this was late January). So I gently scrubbed the whole plant - leaves, stems, and fruit with 70% isopropyl alcohol until you couldn't find any trace of the pest. I misted it with mineral oil (labeled as an all season horticultural spray), as well as the dirt. I checked every few days for the last month for signs that the scale was back (none found) and watched the remaining leaves fall one by one. I plucked the poor-doing fruit mid-way through this to see if I could redirect the plant's efforts. It has had no leaves for a week or two now, but I keep making sure it's watered and warm to see if it still has life in it yet.

Today, I noticed 3 little leaves sprouting! (Cue happy dance!) Then on one of those leaves I saw something that looked like a bug (~1 mm in size). I took a close look at the rest of the plant, moved one of the rocks covering the soil, and found a bunch of small silver bugs under the rock. Moving the soil a bit I found even more. They are fast moving, small, silver colored (~1mm?) - not like the scale I previously saw.
Anyone have any guidance for how to remove this new pest? I've attempted to take a photo of the new pest, but they are tiny and fast, so it's not the greatest photo.
Thank you!
Thumb of 2021-03-14/honeyfield/0219cc

Name: Bria
Northern VA (Zone 7a)
Houseplants Birds
Mar 18, 2021 1:39 PM CST
I think they're springtails. Harmless, I think, and important in your composting bin. But they like moisture and may be there if your plant is too wet.
California (Zone 9b)
Mar 23, 2021 7:30 AM CST
I would tend to agree with Bria. If you DO want to control them, then use spinosad. It is derived from a soil bacteria and is virtually non-toxic.

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