West Nile virus, spraying pesticides the wrong response

Scientific evidence suggests that mosquito spraying actually enhances infection rates in the birds that reservoir the virus by directly compromising the avian immune response thus making them more susceptible to infection. Additionally, mosquitoes that survive insecticide exposure may be affected in ways that make them more efficient transmitters of the infectious virus.

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Subject:   Spraying your "registered" POISONS is the wrong response----
Date:       Fri, 27 Oct 2000 09:45:31 -0400
From:        Stephen Tvedten <steve@getipm.com>
Organization:     Get Set Inc. (www.getipm.com)

To:     Paul Helliker <phelliker@cdpr.ca.gov>
          Director, State of California, Department of Pesticide Regulation 

Dear Mr. Helliker,  I thought you might like to read a press release from the American Bird Conservancy dated Monday, October 23, 2000, entitled:  West Nile virus, spraying pesticides the wrong response.  http://www.enn.com/direct/display-release.asp?id=2428  

WASHINGTON D.C. ‹ Spraying pesticides in response to the presence of West Nile virus, the wrong response.  

Spraying pesticides in urban and suburban areas does little to reduce the spread of West Nile Virus, is extremely harmful to birds and may also harm the humans it is intended to protect.  

Some of the chemicals being used to combat West Nile have direct, toxic effects on birds and other wildlife, while others are highly toxic to non-target and beneficial insects, such as butterflies, bees and dragonflies, and to most aquatic life. Rampant spraying of pesticides greatly reduces the numbers of insects available as food to resident birds and the millions of migratory warblers,  thrushes and shorebirds that stop in areas that have been sprayed. Run-off and aerial drift of sprayed pesticides contaminates ecosystems distant from the original site of pesticide application making dangers less predictable and controllable.

A significant body of research shows that mosquito insecticides are also harmful to human health. Pyrethroids, said by mosquito control officials to be harmless to humans are in fact suspected endocrine disrupters, and have also been shown to cause chromosomes abnormalities. In laboratory studies, many of the organophosphate insecticides being used cause neurological disorders, immune dysfunction and cancer.  

West Nile Virus has had a far greater impact on birds than humans in North America with sixty bird species (including Merlins, Great Horned Owls, Catbirds, warblers, gulls, swans and at least one Bald Eagle), amounting to thousands of individual birds, testing positive to date. By contrast, there have been only eight human deaths from West Nile in the U.S. in two years.  

Scientific evidence suggests that mosquito spraying actually enhances infection rates in the birds that reservoir the virus by directly compromising the avian immune response thus making them more susceptible to infection. Additionally, mosquitoes that survive insecticide exposure may be affected in ways that make them more efficient transmitters of the infectious virus. American Bird  Conservancy suggests measures for containing West Nile Virus should mirror preventive measures currently taken by public health and mosquito abatement officials for St. Louis Encephalitis - a similar virus, as outlined by the Centers for Disease Control. These measures generally do not entail the spraying of adult mosquitoes in residential or suburban areas. Instead, controlling mosquitoes at the larval stage using less toxic methods is advocated and remains the most effective and least environmentally harmful methodology available.  

"The response to West Nile is a typical example of how pesticides are used to control perceived risk. Risks they often end up compounding," said Kelley Tucker, Director of American Bird Conservancy's Pesticides and Birds Campaign. "As the outbreak of West Nile Virus has shown, birds are important sentinels of environmental health. We can't afford to ignore them".

For more information contact: Linda Farley at American Bird Conservancy  Tel: (202) 778-9666 week; Tel: (202) 293-9250 week end; Fax: (202)  778-9778;  E-mail:abc@abcbirds.org  

Web site: http://www.abcbirds.org  

Well Mr. Helliker, Over 25 years ago our studies on Sanibel Island proved there were more mosquitoes the day after the spraying of your "registered" POISONS than the day prior to the POISON spray application!  Your "registered" broad spectrum POISONS obviously kill the beneficials and/or predators far better than they "control" the pest problem.  After the frost naturally controls the mosquitoes again this year --- watch all of the "health officials" take their bows and claim once again your POISONS did the job!  

Respectfully,  Stephen L. Tvedten

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