Now this could be fun, especially on Malta.
Catnip is a natural mosquito repellent. In August 2010, entomologists at Iowa State University reported to the American Chemical Society that catnip is ten times more effective than DEET, the chemical found in most commercial insect repellents. According to Iowa State researcher Chris Peterson, the reason for its effectiveness is still unknown. It might simply be acting as an irritant or they don't like the smell. But nobody really knows why insect repellents work.
Other hints here: http://eartheasy.com/blog/2011/04/5-eas … ng-plants/
We may grow some in pots on the balconies.