Canadian Gardening: Little flies infesting my Pansy container plant, 1 by DepartureBay

DepartureBay wrote:
Can anyone help me to get rid of the little flies that have infested my beautiful pansy container plant? I sprayed the whole plant with diluted dish soap and water and they are not gone. The plant has gone totally limp and looks like it's dead! I'm very new to gardening and don't know what to do. Someone said it might be in the soil and replanting it in new soil might help. If the flies are in the soil, would that not just spread to the new soil? Please advise. Here's a pix of the fly on the side of the container. What are they called?