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Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
klugesmith wrote ...
Nik wrote ... You could tape all the gaps in the walls, windows and doors shut and shovel a few pounds of dry ice in there. Just make sure to air it out the next day before you go in.
To displace all the air from aforementioned barn, I figure you'd need about 2 tons of carbon dioxide gas.
Are arachnids as susceptible as red-blooded vertebrates to carbon monoxide poisoning? If so, then light up some charcoal-fired grills in there. Or look into the 19th century processes that turned coke into CO, e.g. for illumination by gas. Avoid the ones using steam, which IIRC produce more H2 than CO.
This study showed that you need 20 times more monoxide than oxygen in the atmosphere surrounding a hemocyanin invertebrate before it will "poison" the spider
Other studies showed that spiders put in 4% oxygen enviroment would suffocate within half an hour.
Spiders are not able to close their book lungs, as their only have muscles to open them, so diffusion always takes place and other experiments where they were sprayed with liquid ether the book lungs would also open up.
Some spiders can dive into water for longer than 30 minutes while the small hairs on theirs bodies will hold a air film that it can breath in, or some even bring air with a small web they keep on their belly.
Registered Member #2901
Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
They can stand pretty high levels of ozone too unfortunately, so the obvious high voltage solution doesn't work (not before rotting the tires of any vehicle parked close to the barn at any rate).
Take out all your high voltage stuff. Lay a (soon to be connected to HV) sheet of aluminum foil on the floor. Spray a jet of water all over the interior. Drag a wire from the foil to a source far away. Your deathstick becomes a deathsheet, esp. if you put it on hard to reach places and all.
I have a spider infestation, too, outside. Luckily none have wanted to take residence in my HV stuff in the barn, as far as I know. I think they are. are harmless, unlike the redbacks, so I just use a hose to wash them away.
I think what you should do is attach a HV source to a vacuum extender, and vacuum up spiders with the power turned on in the HV netting. It will zap them while vacuuming them. After all of them are gone, spray several spider-killing sprays in there. After a few days, go back in there and air all of the spray out... as Mythbusters proved an arc can ignite a room with bug spray in it in that amount.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
I know nothing about clearing spider infestations but I suspect that the place to start is how do you prevent future spider infestations ? and work backwards from there.
Registered Member #5620
Joined: Sat Jul 07 2012, 01:41AM
Location: Jacksonville Fl
Posts: 8
Sulaiman is on the right track with eliminating their food source. Those redbacks remind me of our orb weavers, they send shivers down my spine. If I heard one *plop* i'd probably burn my house down lol. Anyway I read that insecticides have a hard time with spiders as they work on bugs that drag their bodies across the floor...
With that said I've had this idea for a while to build a real powerful bass amp and just crank some lil wayne in the garage. I figure if it worked it would take maybe a few minutes every hour for a week. It would have to be something that could rattle the windows though 100dB plus. I don't know if spiders hear but I doubt they would like the vibrations.
Registered Member #4074
Joined: Mon Aug 29 2011, 06:58AM
Location: Australia
Posts: 335
Well, a few days ago I spread some diatomaceous earth around whilst wearing a dust mask and goggles. Seems to have killed quite a few spiders, as there's no where near as many webs around ground level now. Spider City is still thriving in the rafters though.
The HV solution was fun, but extremely impractical. Although, when dusting everything I found a HUGE huntsman spider, about 5 inches end-to-end, and had to fry it out of existence with the deathstick.
I would love to find out the cause of these spider infestations, so I can put a stop to them, but I don't know if it's possible. Every summer we get thousands of redbacks all over the countryside. They nest in our garage, pool fence, gardens, basically EVERYWHERE. At the same time, hundreds of huge huntsmen spiders start stalking the land (they actively hunt, and don't build webs) and little tiny lizards show up in every nook and cranny. And don't get me started on the massive red centipedes D:
Essentially, the entire region comes alive with creepy crawlies in the warmer months.
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How to deal with a spider infestation?
