Answer: It sounds like a population explosion of root weevils. You can destroy them by plunging the entire pot, plant and all, into a basin of water. The weevils will float to the surface so you can scoop them up and squish them or toss them into a container filled with water with a half inch of vegetable oil on the surface. The oil will smother the weevils. After you've chased the weevils out, repot the plant in fresh soil.
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