The answer to 'sod invasive plants' is to first identify the invasive plants, then take steps to remove them and prevent their spread. Common invasive plants that can invade sod include creeping charlie, dandelions, crabgrass, and quackgrass. Symptoms include patches of weeds growing amongst the grass, and the invasive plants outcompeting the desired grass.
For small infestations, you may be able to pull the weeds by hand. For larger areas, you may need to use a selective herbicide to target the invasive plants without harming the sod. It's best to call a professional landscaper if the infestation is severe, as they have the expertise and equipment to properly treat the issue and prevent further spread.