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You can try hanging yellow no pest strips near the plants, they are attracted to the color yellow. This will only get a small part of the population but will give you an idea how bad the infestation really is.
If you shake the plants and they all fly off you can use a vacuum cleaner hose to suck them up. Other than that a little neem or insecticidal soap should blast them pretty good. Minute pirate bugs and paristoid wasps are their natural enemies if you want to try that route.
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