I've read for some time of mosquito nets that kill mosquitos that perch on them, said to be a widely deployed and useful means of reducing malaria in dangerous areas. Don't know if the technology is just a matter of soaking the nets in permithrin or whatever, or something more exotic.

But no one I've talked to in Bangkok seems to know about this, are they available here?

Also, is DDT on the market? I've heard that it is making a comeback, agin in connection with malaria and dengue control.

Swelters

What Wiki says about treated nets.

http://en.wikipedia.org/wiki/Mosquito_net

Thai company that makes them. http://www.thaibednets.com/indexnew.html