The key is the pesticide application regimen.
Most pesticides only kill adults, leaving eggs and juveniles to mature and reproduce, which is why a single treatment is not enough.
Using a pesticide labeled for the critter in question, spray all exposed surfaces of all plants to dripping AND drench the potting medium. Repeat that two additional times at one-week intervals.
Those subsequent treatments increase the likelihood that you’ll kill the newly matured bugs before they get a chance to reproduce.
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