In most cases, large canals and ditches are not prime habitats for prolific mosquito breeding. The main reason is that these canals or ditches usually contain large and varied natural predator populations (such as fish, tadpoles, dragonfly larvae, etc.) that act to control mosquito breeding. Most mosquito breeding problems around a residence are caused by standing water or containers that have not been emptied or treated. If you are concerned that an area may be breeding mosquitoes, call our office at 225-214-5900 to report the issue and we will have one of our staff investigate the problem.