Friday, August 1, 2008

Mosquito Fogging Scheduled for the Cities of Casa Grande and Maricopa, along with the Johnson Ranch area

By Heather Murphy


     FLORENCE ––Pinal County Environmental Health Services announced today that mosquito samples collected near the cities of Casa Grande, Maricopa, and the Johnson Ranch area have tested positive for West Nile Virus.  This brings to four the total number of West Nile Virus positive mosquito samples collected by PCEHS in 2008.  Environmental Health will conduct adult mosquito fogging, weather permitting, beginning Monday August 4th, 2008 through Wednesday August 6th, 2008 from 10:00 p.m. to 5:00 a.m.


     The area to be fogged in the City of Casa Grande encompasses Earley Road to the north, Henness Road to the east, Selma Highway to the south, and Peart Road to the west.


     The area to be fogged in the City of Maricopa includes the subdivisions of Maricopa Meadows, Alterra North and Alterra South.


     In Johnson Ranch the area to be fogged encompasses the Union Pacific Railroad tracks to the east, Judd Road to the south, the Gantzel Road alignment to the west and Bella Vista Road to the north.

For maps of the scheduled fogging areas, see our website at


     The pesticide that will be used during fogging is called Anvil. It is a pre-mixed, ready to use product that contains two active ingredients: Sumithrin (2%) and piperonyl butoxide (2%) Sumithrin is a man-made version of a natural pesticide found in chrysanthemum flowers. Piperonyl butoxide helps Sumithrin work better against mosquitoes. Anvil is registered with the U.S. EPA and is effective against mosquitoes that carry West Nile Virus. There are several things that residents can do to reduce exposure during fogging:


· Close all windows and doors. Air conditioners can still be operated, but if they have vents to bring in outside air, they should be closed.  Turn off evaporative coolers.

· Stay inside your home.

· If possible, bring pets inside.

· Thirty minutes after the end of the scheduled fogging each night, you may resume normal activities.


     West Nile Virus is transmitted to humans and animals through the bite of an infected mosquito.  West Nile Virus can cause severe illness in people and horses, although not everyone that is infected will develop symptoms.  People of all ages can be affected.  However, the elderly may be more prone to serious illness.

     County health officials urge all county residents to "Fight the Bite" and follow these simple personal precautions to avoid mosquitoes and the diseases they may carry:

· Avoid outside activity between dusk and dawn, when mosquitoes are most active.

· If you must be outdoors when mosquitoes are active, wear lightweight clothing that covers your arms and legs and use an insect repellent containing an EPA registered active ingredient such as DEET, Picaridin or oil of lemon eucalyptus.  Always follow the directions on the label.

· Make sure doors and windows have tight fitting screens and remain closed. Repair or replace screens that have tears or holes in them.

· Eliminate mosquito-breeding sites around the home by removing standing water in potted plants, tires, bird baths and other containers where water may collect.

· Ensure that swimming pools and decorative water features are properly maintained.

· Change water in flowerpots, birdbaths and pet watering bowls located outdoors at least twice per week.


     The County has a mosquito hotline and a webpage.  If you would like information on mosquito prevention and control, please call: 866-287-0209, ext. 6200, or visit the West Nile Virus webpage at


     For information or questions concerning the health effects of West Nile Virus, please call the Pinal County Public Health Information Hotline: 866-763-7252.