Mosquito Management by Trained Personnel - Purdue Extension ...

MOSQUITO MANAGEMENT BY TRAINED PERSONNEL — E-52-W
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adult mosquitoes and provides little or no residual control.
Like the thermal fog generator, the cold aerosol machine
should be used during the time the adult mosquitoes are
most active. This means from twilight until about midnight,
when atmospheric conditions are usually best (lack of wind).
ULV application is generally the preferred space treatment
for adult mosquito control.
The cold aerosol method has certain advantages over
thermal fog generators. Less insecticide is applied, resulting
in fewer pollution problems. Smaller holding tanks and
consequently smaller vehicles are needed because smaller
quantities of insecticide are used. There is less of a traffic
hazard compared with thermal fog applications, which reduce
visibility. ULV ground applications, however, are somewhat
less effective than thermal fogs in heavy vegetation, because
the larger ULV droplets tend to be filtered out more rapidly.
Insecticides recommended for use with ULV ground equipment
include: permethrin (Biomist), chlorpyrifos (Dursban,
Mosquitomist), sumethrin (Anvil), malathion (Fyfanon),
synergized pyrethrins, and resmethrin (Scourge). (Note that
resmethrin is a restricted use insectcide.)
Application by fixed-wing aircraft or helicopter for adult
mosquito control is also a common practice. It is useful
under emergency conditions or if areas to be controlled are
too large or are inaccessible for economical treatment with
ground powered equipment. Best results are obtained in
areas without dense tree cover so that spray particles can
penetrate the low shrub zone where the greatest mosquito
activity occurs. To obtain uniform coverage of an area, careful
observance of preplanned flight patterns, altitudes, and air
speeds is essential.
Applications should not be made over a food or feed crop
area or populated areas unless the insecticide is labelled for
that use. Label directions regarding application over fishbearing
waters should be followed. The same insecticides
for use with ground ULV equipment can be considered for
aerial treatment. For proper mixing instructions, application
rates, and precautions for any insecticides used, all label
directions should be read and followed carefully.
READ AND FOLLOW ALL LABEL INSTRUCTIONS. THIS INCLUDES DIRECTIONS FOR USE, PRECAUTIONARY STATEMENTS (HAZ-
ARDS TO HUMANS, DOMESTIC ANIMALS, AND ENDANGERED SPECIES), ENVIRONMENTAL HAZARDS, RATES OF APPLICATION,
NUMBER OF APPLICATIONS, REENTRY INTERVALS, HARVEST RESTRICTIONS, STORAGE AND DISPOSAL, AND ANY SPECIFIC
WARNINGS AND/OR PRECAUTIONS FOR SAFE HANDLING OF THE PESTICIDE.
Revised 5/2010
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