I have been using Vapona indoor liquid for mosquitoes for several years and I am satisfied. I decided to try Vapona's outdoor spray in the yard, where there are many plants with moisture. The result was relatively mediocre. We didn't have too many mosquitoes, but there were some. Because I have been researching the topic, I have concluded that for outdoor areas with mosquitoes, perhaps the best option would be to have a portable battery-operated device that works with mosquito repellent tablets and "fortifies" an area within a certain radius. I haven't found anything like that in the Greek market, but such devices are available on Amazon.