Q: Where is the Department of Health dengue info?
Q: Who designed these traps?
These traps are based on the CDC-Autocidal Gravid Ovitrap (CDC-AGO) [Mackay et al. 2013, Barrera et al. 2014a, b]. The traps have been modified by me (Van Eden) to make them easier for ordinary people to build, using readily available materials and chemicals. The principles of the trap have been preserved.
Q: What about the PET bottle, sugar, yeast trap?
I searched (using scholar.google.com) but have found no research papers that looked into this kind of trap. It is supposed to work because it is known that mosquitoes are attracted to CO2 – which is generated by the yeast.
One question is how long the sugar will last. My guess (based on brewing beer) is that the sugar will need to be replenished every day. Eventually, enough alcohol will build up that it kills the yeast. Then just remake it.
12/23: I’ve been testing one of these traps for three weeks now. It has not captured a single Aedes spp mosquito. Just bugs. And one gecko. Poor guy was just barely keeping his head above the water when I found him. He was able to crawl away after I freed him.
Q: Are there commercial traps?
Yes, the US Army has a patent on this technology (wtf?) and it is licensed to SpringStar. They make a trap called TrapNKill, which is available from Home Depot in Hilo, and maybe other places. SpringStar and Home Depot rushed a shipment to us in early December.
The TrapNKill works a little differently, but the principles are the same.
There are other traps, but I have no knowledge of them so can’t comment on their effectiveness. Researchers use fancy ones like the BG Sentinel.
Q: There is a film of white powder across the top of the water, it’s not dissolving. What’s wrong?
The boric acid will dissolve easily and fast. The white powder you see floating on the surface is the Ant Dust from the landing pad. It doesn’t dissolve, and it’s typical for any excess on the pad to fall into the water where it floats. Your trap will still work fine! Next time you make a landing strip with Ant Dust, shake it well to dislodge excess dust.