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Upon first hearing about the application of
misting for mosquito control, the first question most people ask is,
“Does it work?” The second question is inevitably, “Is it
safe?” That is why before you get serious about whether or not to
purchase a MistAway system, it is important that you understand what
the insecticide is, what it is not, and how to safely use it in your
system.
DERIVED FROM FLOWERS, BUT NOT “NATURAL”
The active ingredient in the insecticide used
in MistAway systems is comprised of a family of chemicals called
pyrethrins, which are derived from the extract of chrysanthemum
flowers (pyrethrum). Though its origin sounds natural, it is not
correct to think of pyrethrin-based insecticides as either
“natural” or “organic” because, in addition to being highly
refined, they usually contain a man-made synergist. A synergist is
an additive that enables the insecticide to be more effective than
it would otherwise be. Pyrethrins act as contact poisons, affecting
the nervous system of insects. So, they rid the property of
mosquitoes and other  annoying
insects primarily by killing rather than repelling them. Pyrethrins
are not species selective and their contact will also kill
beneficial insects like bees and butterflies. Fortunately, these
insects tend to be active during times when most mosquitoes are not.
Pyrethrins are rapidly degraded by sunlight or by rain, leaving the
yard free of residual active ingredients. Because some plants
exhibit sensitivity to direct application of some pyrethrin-based
insecticides, nozzles should be placed where they do not mist
directly on those plants.
PYRETHRIN SAFETY
Pyrethrin-based formulations are considered by
the EPA to be “general use” insecticides – meaning that
homeowners can buy and use them without a license. They are one of
the least poisonous insecticides to mammals. In fact, pyrethrins are
important ingredients in products commonly found in many homes.
Household aerosols and pet shampoos are good examples. But, they are
poisons. While they are low in toxicity to people and pets because
the body quickly breaks them down, it is not a good idea to come
into close or frequent direct contact with the mist. Inhaling
pyrethrins can cause respiratory problems (coughing, wheezing, etc.)
and skin contact can cause a rash or itching. Pyrethrins are highly
toxic to fish and tadpoles and should be especially carefully
applied around water.
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