1) Cedarcide. Sprayed with a hose attachment, you can spray the door and
around it. Another option of the same ilk is a garlic extract based spray
such as Mosquito Barrier. The former is relatively inexpensive and seems to
do a decent job against skeeters -- considering it's contents it may well
work on other insects as well (the packaging claims it does at least).
Mosquito Barrier is highly touted however it's a bit more expensive (really
only available online so shipping factors in) so I have not given it a
2) The Mosquito Deleto Inhibitor. These look kind of like little lamps and
they spread a sort of citrus scent about the area. They work pretty well.
In addition to the above, Cutter has a candle based repellent (candle heats
a tab at the top of a lamp) that works well in a yard area and there are any
of a number of other burning sticks/coils/etc. that are touted as helping.
The above two are the ones that I have found most effective with my mosquito
issues. I also run a Mosquito Deleto in the back yard where their breeding
areas are heaviest. The Mosquito Deleto isn't too bad -- we bought ours a
couple of years back for about $80 although the newer models have a few more
bells and whistles coming in around $125-$150 or so.
If you have Mosquito problems as bad as you describe, then it might just be
time to sock away the money for a Mosquito Magnet. The price really stinks
IMHO, but one thing you can't argue is their effectiveness. I'm afraid
we'll likely suck it up and buy one next summer ourselves.
Additionally, the standard/sub-standard applies -- empty standing water,
find any damp spaces and sprinkle BT pellets about liberally, place mosquito
dunks (also BT) in ponds and such, and so forth. If it weren't for the fact
my neighbor started clearing out his swampland that adjoins my property
(little 50x50 area that is low lying and just a huge bog) I was going to
start tossing BT pellets over there myself.