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E-M:/ West Nile and EEE spraying can increess numbers of Moquitoes mosttalented at transmitting the disease.
- Subject: E-M:/ West Nile and EEE spraying can increess numbers of Moquitoes mosttalented at transmitting the disease.
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- Date: Fri, 21 Feb 2003 07:59:32 -0500
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Impact of naled (Dibrom 14) on the mosquito vectors of eastern equine encephalitis
SOURCE: Journal of the Am Mosquito Control Assoc, Dec;13(4):315-25, 1997
- Howard JJ, Oliver - New York State Department of Health, SUNY-College ESF,
Syracuse 13210, USA.
In central New York, aerial mosquito adulticide applications
have been used in response to eastern equine encephalitis (EEE) outbreaks
and have targeted the swamp habitats of the primary enzootic vector of EEE
virus, Culiseta melanura (Coquillett). The organophosphate insecticide naled
(1, 2, dibromo-2, 2-dichloroethyl dimethyl phosphate) has been the insecticide
of choice in this region. This study reports on analyses of 11 years (1984-94)
of mosquito collection data from Cicero and Toad Harbor swamps in relation
to applications of naled.
Naled applications were successful in achieving short-term reductions in
mosquito abundance. However, despite repetitive applications, populations
of the primary vector of EEE virus, Cs. melanura, have
increased 15-fold at Cicero Swamp. Preventive applications had no
noticeable impact on the enzootic amplification of EEE virus, and isolations
of virus following preventive applications have resulted in additional spraying.
The possibility that applications of naled contributed to increased populations
of Cs. melanura discredits the rationale that preventive applications of
naled reduce the risk of EEE.
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