Last year we began stocking Spartan Mosquito Eradicators and had great feedback! I personally had luck with them also.
Now - early April - is the time to install eradicators. One box will treat one acre for up to 90 days. Last year mine lasted around 60 days.
How to install:
1. Add warm water to the fill line of tubes.
2. Shake tubes.
3. Hang in shaded area at head height.
4. Change tubes out every 90 days during mosquito season.