Why does the soil in the flowerpot produce centipedes?

Once flowers and seedlings are planted in flowerpots for a long time, applying organic fertilizer or humus frequently will attract centipedes to eat or settle down. There are centipedes in the flowerpot, which proves that there are insects in the soil. The easiest way to find centipedes in flowerpots is to change the soil. Move the flowerpot with centipede outside, pour out the soil in the pot and replace it with new soil. Note that the new soil can only be used after exposure. This method is thorough and harmless to flowers and plants. Centipede is used to sleeping during the day and coming out at night. You can move the flowerpot to a sunny place, keep the bottom of the flowerpot ventilated, sprinkle some pesticides on the tray at night, and the centipede will be killed directly when it comes out.