[LEPS-L:7860] aerial spraying of quimical vs biological

[Jean-Michel MAES]

BAYTEX is fenthion (formulation by Bayer), if I understand well it's a
phosphorate insecticide. It's not a biological control agent.
I would be interested to know about verified cases of Odonata, bees and
other insects killed by Bacillus thuringiensis israelensis or other mosquito
biological control.

Sincerely,

Jean-Michel MAES
MUSEO ENTOMOLOGICO
AP 527
LEON
NICARAGUA
tel 505-3116586
jmmaes at ibw.com.ni
www.insectariumvirtual.com/termitero/termitero.htm#nicaragua
www.insectariumvirtual.com/lasmariposasdenicaragua.htm
www-museum.unl.edu/research/entomology/workers/JMaes.htm
www-museum.unl.edu/research/entomology/database2/honduintro.htm
----- Original Message -----
From: rudy benavides <rbenavid at hotmail.com>
To: <leps-l at lists.yale.edu>
Sent: Tuesday, November 14, 2000 9:52 AM
Subject: Re: aerial spraying is "DEVASTATING " to non-target species


> In the late 1960s when my parents moved to the Ft. Myers, Florida area we
> became acutely aware of this situation.  At least once a week, the county
> there would dispatch a small squadron of DC-3s to fly back and forth
across
> the area - at a pretty low altitude - and spray (fog) the place with
BAYTEX.
>   I clearly remember how, when I was out jogging, and would hear the roar
of
> the engines in the distance, my heart would race, and I would make a mad
> dash for home before the planes arrived overhead.
>
> Our neighbor had a bait and tackle shop in town.  When the flights first
> started, and the windows in his shop had been left open, he found most of
> the live bait shrimp in his water tanks dead after a spraying.  He was
> caught unaware a few other times, and had similar results, until he
finally
> called the city and was able to obtain information on their (erratic)
flight
> schedules.  After that, he made sure his windows were shut on spraying
days,
> and the incidents never re-occurred.
>
> On nearby Sanibel Island, which is in great part a wildlife sanctuary made
> up of federal and private preserves, naturalists there fought to have the
> flights in and round the island halted.  I remember reading at the time
how
> large numbers of bees, dragonflies, birds, fish, and crustaceans were
found
> dead on Sanibel on the days following a spraying.  Today, mosquito
> management at the National Wildlife Refuge on Sanibel includes the
presence
> of tiny Gambusia affinis, mosquito fish in dikes constructed to impound
> water all year round.  The fish feed on the larva, and the water also
forces
> the mosquitos to oviposit on dry land that eventually is flooded by tides
or
> by rainfall.  This has worked out very well on the refuge, and I have not
> encountered mosquito problems when I have visited there at different times
> of the year.
>
> Rudy Benavides
> Maryland
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