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From: Royston Vasey on 8 Apr 2010 07:40

"Robert Roland" <fake(a)ddress.no> wrote in message
news:l6frr5da0humn1ge6rplnd6o8vf6r4vtod(a)4ax.com...
> On Thu, 8 Apr 2010 04:18:11 -0500, "George Jefferson"
> <George(a)Jefferson.com> wrote:
>
>>Is there a chemical deadly to mosquitos that is lighter than air?
>
> Helium. It's not poisonous, but it displaces air, so that anything
> needing oxygen would suffocate. It does, of course, require the
> concentration to be kept really high inside your trap.
> --
> RoRo


Maybe a few problems:
1) because the density would be really low maybe the could not "fly" in it.
2) their voices would be squeaky.


From: amdx on 8 Apr 2010 09:18

"George Jefferson" <George(a)Jefferson.com> wrote in message
news:hpk70l$qrl$1(a)news.eternal-september.org...
> Is there a chemical deadly to mosquitos that is lighter than air?
>
> I was thinking about making an device that could kill them. I guess it's
> probably no better than a bug zapper.
>
> The idea is that since they, supposedly, are attracted to CO2, to make a
> bucket with an inverted code with a hole at the bottom. The mosquitos find
> there way to the hole which is releasing CO2 then go instead. The gas is
> trapped at the top of the inverted cone which should kill them.
>
>
> |\ /|
> | \ / |
> | |
> -------
>
> They probably already make this sorta thing but it seems like it would be
> something rather easy and very cheap and one could place several of them
> throughout the property which is more efficient than just one or two
> zappers. The gas would allow one to increase the opening hole size which
> might be more effective.
>
> Seems they already have many of these types of devices. Most don't use the
> gas. Probably not necessary. Do these devices work well? I can get a small
> cylinder of CO2 and rig something up quite easily if it's worth doing.
>
I like the inverted cone idea, I'm in Fl. and the local mosquito control
uses dry ice
(solid CO2) in their traps to attract the mosquitos.
The density of air is 1.20 kg/m^3 and CO2 is 1.8 kg/m^3 so you the trap
would
stay full of CO2, just allow enough CO2 flow to get some gas into the local
environment
to attract the mosquitos. Once they go in, there would be no oxygen and they
would die.
It seems from other products that the lights also attract the mosquitos, so
adding a light
around the top may increase the kill rate.
I think you'll need to experiment to optimize cone depth and angle. Maybe a
light outside
to get them to the trap and a light inside at the bottom of the hole to get
them inside.

(B)
| \ / |
| \ / | (B) is a mosquito attracting light.
| (B) |
-------

Mike




From: pimpom on 8 Apr 2010 09:24
Martin Brown wrote:
>
> Pheromone bait will work considerably better. Electric traps
> make a
> satisfying frying noise when the creature meets its end.
>
We have Chinese-made 'mosquito fryers' here. They are shaped like
a tennis racket, use a rechargable battery and produce a really
satisfying crackle when you swipe a mosquito. It comes with a
flashlight on the handle, pointing sideways in the direction of a
swipe and costs about US $4.


From: Spehro Pefhany on 8 Apr 2010 09:43
On Thu, 8 Apr 2010 18:54:35 +0530, "pimpom" <pimpom(a)invalid.invalid>
wrote:

>Martin Brown wrote:
>>
>> Pheromone bait will work considerably better. Electric traps
>> make a
>> satisfying frying noise when the creature meets its end.
>>
>We have Chinese-made 'mosquito fryers' here. They are shaped like
>a tennis racket, use a rechargable battery and produce a really
>satisfying crackle when you swipe a mosquito. It comes with a
>flashlight on the handle, pointing sideways in the direction of a
>swipe and costs about US $4.
>

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=40122

I think I've seen them for $1.99.

The fancy mosquito killers use propane:

http://www.amazon.com/Koolatron-Guardian-Shield-Propane-Mosquito/dp/B001P6E2UC


From: Jim Thompson on 8 Apr 2010 10:34
On Thu, 08 Apr 2010 09:43:12 -0400, Spehro Pefhany
<speffSNIP(a)interlogDOTyou.knowwhat> wrote:

>On Thu, 8 Apr 2010 18:54:35 +0530, "pimpom" <pimpom(a)invalid.invalid>
>wrote:
>
>>Martin Brown wrote:
>>>
>>> Pheromone bait will work considerably better. Electric traps
>>> make a
>>> satisfying frying noise when the creature meets its end.
>>>
>>We have Chinese-made 'mosquito fryers' here. They are shaped like
>>a tennis racket, use a rechargable battery and produce a really
>>satisfying crackle when you swipe a mosquito. It comes with a
>>flashlight on the handle, pointing sideways in the direction of a
>>swipe and costs about US $4.
>>
>
>http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=40122
>
>I think I've seen them for $1.99.
>
>The fancy mosquito killers use propane:
>
>http://www.amazon.com/Koolatron-Guardian-Shield-Propane-Mosquito/dp/B001P6E2UC
>

Yep. Those supposedly work well enough that one or two will cover
your whole back yard.

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

The only thing bipartisan in this country is hypocrisy
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