This one is at Villa Kusi. Fly into the area and destroy the growths. You have to destroy the entire growth before you die or it grows back. The fly traps you have to use the retractor on their mouths to open them up and shoot them in the mouth.
Next, you have to destroy the source. Use the retract to open the bulb and then shoot at the red. Repeat two more times for the achievement. If you die, you have to start destroying the source from the checkpoint (after destroying the growths).