One of the first things I was amazed by when I came to Hawaii ( no, I didn't discover the Tahitian canoeists until later) was the low mosquito population. Coming from New Jersey, I expected to see scads of the nasty buggers. Especially in southern Jersey, one gets eaten alive during the warm months, with the worst time being spring before the state has treated the bogs and ponds. And although some places here had a few, some more than others, nowhere came even close to what I was used to. That all being said, we hate the little biting buggers and take steps to control them.
Totally eliminating mosquitos in my area is probably impossible. That's because there are spots that tend to hold water in around here that allow them to breed in remote locations in the woods. We have small lava tubes just below the surface of the ground where water tends to pool. I lifted the top off of an open one once and found hundreds of very active mosquito larvae in the water. Water cupped in a tree crotch, water at the base of bromilliads, water in cupped lava formations all can be breeding grounds.
I've been fairly successful in reducing their numbers around the house. I noticed that they tend to hang around semi-shady areas, so that's where I concentrate my battles. I make water traps so that I can destroy the larvae before they molt into adults. Small basins, or anything that
will hold water, make good traps. An inch or two of water does fine. I have around a dozen of these basins set around. I empty them each week, eliminating a good chunk of potential mosquitos. Then they are refilled with fresh water.
Along these same lines, I made two decorative little fish ponds amid the landscaping. Each is a home to guppies. Since I never, ever see mosquito larvae in the ponds, I'd say that the guppies are 100% effective.
I make sure there is no pooled water about. No tin cans, tires, buckets, cups, etc that could hold water. No tarps stored outdoors. No wheelbarrow just sitting out there when not in use. That sort of thing.
Rain gutters......I was surprised when I looked. Dozens of larvae! The pitch is not enough to prevent water from pooling in spots. The gutters really need to be reset, but it's a job that I can't get to right now. So I use a hose the flush them out once a week.
Dunks. You can buy them at the store. I use them in the catchment tanks. Even though I have covers on the tanks, they don't keep mosquitos out. (That's why I dont care if I flush the gutters into the cotchment tank.) Dunks work great in killing the larvae.
Livestock tanks, like the catchment tanks, become a haven for mosquitos. I could use dunks, but guppies works just fine. A lot cheaper and self maintaining.
The field catchment tank that I use for the garden has mosquito fish in it. True to their name, they hunt mosquito larvae and eat them.
Occasionally some of the little biting buggers get into the house. The best way we've found to kill them is one of those bug zappers that looks like a tennis racket. It's rather satisfying to hear them explode.
I've never tried one of those mosquito machines, the kind that has a lure, fan, uses a propane tank. I've heard from people that tried them that they work so-so. Since I have the majority of our mosquitos under control, I don't see the need to spend lots of money buying a machine, paying for lure and maintenance, buying propane.
A trick I learned back on the mainland...... Well, I don't use it here because I don't need to, but it worked back in Jersey. I noticed that mosquitos were really attracted to our dogs. I could put one into a wire dog crate and use it as mosquito bait. At the end of the crate opposite the door I'd set up a box fan so that the air blew away from the crate. I made a billowy cover out of old ,women's stockings for the box fan, so that when it was turned on the cover filled out like a four cornered sock. So..... I'd put a dog in the crate, cover the top and sides with a sheet, turn on the fan. The dog slept in comfort on a hot night and the fan caught hundreds and hundreds of adult mosquitos. I think there is a commercial version of this idea advertised on the Internet. I'll see if I can find it and post a photo.