Summer Larviciding

Larviciding Habitat

Mosquito Control staff will begin standing water treatment in flooded woodlands in Midland County starting April 3rd. Please call the office at (989) 832-8677 if you have standing water.

Mosquitoes can be prevented by eliminating standing water producing mosquitoes or by treating aquatic sites with environmentally safe larvicides. To help prevent mosquitoes keep tires indoors or covered with a tarp so they won't hold water. Clean out wading pools, birdbaths, gutters and other water-filled containers.

Midland County Mosquito Control employees inspect and treat standing water to control mosquito larvae throughout the spring and summer. Some of the sites that may produce summer mosquitoes and the frequency of inspection are shown below.

Artificial Containers

  • Horse troughs, rain barrels, buckets, any object capable of holding water
  • Treated as needed

Catch Basins

  • Crocks along city streets which receive rain water and transfer it into sewers
  • Treated 3 to 4 times yearly

Cattail Marsh

  • Cattail marshes and/or brush-covered areas which may be temporarily flooded
  • Treated following major rains

Ditches - Small

  • Shallow ditches in cities or along residential lawns and fields
  • Treated pre-hatch (May-June) and after major rains

Ditches - Roadside

  • Drainage ditches parallel to and within 15' of county roads
  • Treated following major rains


  • Drainage ditches that transfer water into the river drainage system
  • Treated late summer as needed

Flooded Fields

  • Grassy, low areas which may be temporarily flooded (pastures)
  • Treated following major rains

Flooded Woodlots

  • Forested areas with shallow depressions which may be temporarily flooded in spring or following summer rain
  • Treated once in spring or as needed


  • Permanent pools with mostly open water
  • Treated rarely

Sewage Lagoons & Rubbish Pits

  • Sewage-treatment lagoons and other large accumulations of water of high organic content
  • Treated as needed

Sewage Runoff

  • Areas in ditches where water with concentrations of organic matter is present
  • Treated twice yearly


  • Discarded tires without rims or with sidewalls unsealed from the rims
  • Treated twice yearly