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Mosquito Management for West Nile Virus | South Dakota Department of Agriculture

Mosquito Management for West Nile Virus

Commercial Applicator Certification Requirements

  • Applicators who are considering spraying for mosquitoes must be certified by the SDDA in the commercial applicator G (General) category and the mosquito specific category 9 (Public Health).
  • The commercial applicator tests can be taken by going to your local extension office.
  • Upon successful completion of the tests a commercial license application will need to be completed and submitted to the South Dakota Department of Agriculture.
  • The license fee is $25.00 and is current for two years. If an individual already has a license and just needs to add the Category 9 (Public Health) there is no additional licensing fee. Government employees are fee exempt from the $25.00 dollar license fee.

Adult Mosquito Control Recommendations

  • Ground based (truck mounted) application of adult mosquito control agents has several positive attributes. Where road access is adequate, such as in urban and suburban residential areas, ground application can achieve good coverage. Ground applicators can also spray at night targeting mosquitoes when they are most active. Ground applications are prone to skips and patchy coverage in areas where road coverage is not adequate or in which the habitat contains significant barriers to spray dispersal and penetration.
  • Aerial application can cover larger areas in shorter time. This is a critical positive attribute when larger residential areas must be treated quickly. Aerial application is also less prone to patchy coverage than ground- based application in areas where road coverage is not adequate. However, many aerial applicators will not fly at night, reducing the ability to target mosquitoes when they are most active. Cost benefits of aerial application over ground application may not be realized unless relatively large areas are treated.

Mosquito Control Options

Toxicity and Hazards of Selected Insecticides

Insecticide

LD 50 (mg/kg)

Moderately Toxic

?

tralomethrin

99

deltamethrin (Suspend)

128

chlorpyrifos (Dursban, Empire)

135

fenthion (Baytex)

255

carbaryl (Sevin)

307

naled (Dibrom)

430

Relatively Non-Toxic

?

cyfluthrin (Tempo)

500

malathion (Fyfanon)

885

pyrethrins

1500

resemethrin (Scourge, Oblique)

2000

permethrin (Biomist, Permanone)

>4000

sumithrin (Anvil)

>10000

methroprene (Altosid)

>30000

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