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Jasper, IN 47546
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Mosquito Control

Policy of Treatment

The City of Jasper has developed and implemented a mosquito surveillance and control program to help stop the spread of the west Nile Virus and other mosquito-borne illnesses. The City of Jasper, through its Street Department will:
  • Work closely with the public to find and get rid of mosquito breeding areas.
  • Apply larvicides in some mosquito breeding sites that cannot be eliminated, such as retention ponds, drainage ditches, storm drains, and catch basins.

The Street Department will periodically make inspections throughout the corporate limits of the City of Jasper to identify areas with standing water. A list of these areas is maintained at the Street Department. The Street Department does not have the resources to identify every area of possible concern; and so welcomes the input of its residents.

Information of Treatment

Larvicides kill mosquitoes while the insects are living under water in their larva stage, and so larvicides must be applied directly to bodies of water. Adulticides are pesticides that kill adult mosquitoes. Adult mosquitoes can only be killed when they are flying around. For that reason, audulticides must be sprayed into the air either from ground vehicles or from helicopters and airplanes.

The City of Jasper uses a larvicide called VectoLex. VectoLex is a kind of pesticide that is used to control immature mosquitoes when they are living and growing under water in their larva stage of development. When mosquito larva eats the bacteria, toxins produced by the bacteria bind to certain kinds of cells (called receptor cells) in the gut of the mosquito. This process disrupts the way the gut works and ultimately causes the insect to starve to death. VectoLex does not harm people, animals, or marine life. The special receptor cells that are disrupted by VectoLex are only present in the gut of mosquitoes. Because people, mammals and fish do not have these receptor cells, they are not affected by VectoLex.

Some larvicides are made from chemicals. Other larvicides, called microbial larvicides, are made from naturally occurring bacteria. VectoLex is a microbial larvicides made from a kind of bacterium called Bacillus Sphaericus. Found throughout the world, Bacillus Sphaericus has been registered by the federal EPA since 1991 for use against various kinds of mosquito larvae. Microbial pesticides like VectoLex have undergone extensive testing prior to registration. They are essentially nontoxic to humans when they are used according to label directions. When used in water, the bacteria are rapidly destroyed, and their toxins do not harm fish or other marine life.

Method of Application

The City of Jasper Street Department will use the following precautions while applying VectoLex larvicide. Personnel must wear protective gloves and safety glasses. Should eye or skin irritation be experienced due to direct exposure to VectoLex, rinse the eyes with tap water for 20 minutes and wash the skin thoroughly with soap and water. If symptoms persist, first contact your local doctor or emergency department, and then contact the Poison Control Center at 800-336-6997.

VectoLex should be applied starting in April and continue until the first frost of the fall season. A supply of VectoLex is kept at the Jasper Street Department; but, small amounts (usually one gallon) of the granular formula are taken to an application site. VectoLex should be reapplied every 15-21 days. One measuring cup will cover a 2723 square feet area (equal to a 52 x 52 area or a 540 x 5 ditch). 1/3 cup will adequately treat the average catch basin.

Record Keeping

The Jasper Street Department keeps records of sites treated, the amount of granular used, and how often these sites are visited. Input from residents concerning a potential breading area is encouraged.

Future Planning

An inspection will be performed by the Jasper Street Department annually, during the first half of the month of April. This inspection should occur during a period of average rain fall. Current and future weather conditions should be considered prior to the application of the larvicide. During rainy conditions most drainage ways will have considerable flow and will require less treatment. During dry conditions more treatment will be required, as less flow will allow water to stand in low areas. During drought like conditions less treatment will be required in some areas.

Initial Inspection

An initial inspection of the drainage ways in the City was performed during the first half of April 2003. Prior to this inspection the City was divided into six sections: Northwest, North, Northeast, Central, Southwest, and Southeast. Each map was studied before a physical inspection was performed, to identify drainage ways and retention areas. During the inspection, drainage ways were classified by one of three categories: dry, standing water, or running water.