Over the past few weeks the Mohave County Environmental Health Division (MCEHD) has been conducting mosquito surveillance in response to public complaints. The MCEHD uses the CDC’s recommended matrix as a guide of when to fog.
The matrix prescribes fogging within one square mile when there is a West Nile Virus (WNV) positive mosquito sample, human or horse. To date, we have not received a WNV positive in Mohave County. However, the matrix also prescribes fogging if over 300 storm mosquitos or 30 or more Culex mosquitos are caught in one trap.
The number of Culex mosquitos did exceed 30 in one trap that was set in a populated area of Mohave Valley this past weekend. The area is located north of Dyke Rd., South of Courtwright Rd., west of Highway 95. We believe it is in the best interest of the public’s health to conduct a fogging event in that area.
Adult mosquito control application will begin on Thursday evening, October 29, around 9:00 p.m., weather permitting (ground fogging cannot occur during rain or high winds). Baron Pest Control was awarded the contract to provide larvacide and fogging services within Mohave County and will be conducting the ground fogging application.
Application will be made in the Mohave Valley area north of Dyke Rd., south of Courtwright Rd., and west of Highway 95.
The proposal submitted by Baron Pest Control states that the insecticide to be used is Pyronyl Crop Spray. According to the National Pesticide Information Center, this is an insecticide registered for use against mosquitoes made from pyrethrins.
Pyrethrins are insecticides that are derived from the extract of chrysanthemum flowers. Types of products that contain pyrethrins include indoor bug bombs, human head-lice treatments, and pet flea sprays.
The Environmental Protection Agency recommends the following steps to help reduce possible exposure to insecticides during spraying:
§ Whenever possible, remain indoors with windows closed and air conditioning turned off when spraying is taking place.
§ If you have to remain outdoors, avoid eye contact with the spray. If you get pesticide spray in your eyes, immediately rinse them with water or eye drops.
§ Your child’s health should not be affected by the low levels of pesticides used in mosquito control. However, bring laundry and toys indoors before spraying begins and wash with soap and water if exposed to pesticides during spraying.
§ Bring your pets indoors, and cover ornamental fish ponds to avoid direct exposure.
§ Cover outdoor tables and play equipment or rinse them off with water after spraying is finished.
§ Cover swimming pool surfaces when it is feasible (given the small concentrations of pesticides used, however, special precautions or waiting periods are not usually necessary for outdoor swimming pools.
§ Wash exposed skin surfaces with soap and water if you come in contact with pesticides.
§ Wash exposed fruits and vegetables, such as homegrown or purchased from an outside vendor, with water before storing, cooking or eating them.
§ There is no need to relocate during spraying, but consult your physician if you have physical or psychological concerns regarding the spraying.
§ If you think pesticides are making you sick, seek medical attention as necessary.
Individuals with questions about pesticides should call the National Pesticide Information Center at 1-800-858-7378 from 6:30 a.m. – 4:30 p.m. PST. The NPIC is staffed by trained pesticide specialists who have toxicology and environmental chemistry education and training needed to provide answers to pesticide questions.