There have been numerous ways devised over the years to control pests. The most obvious is to dig out bottles of pesticide - unfortunately, if they're over-used, they can have damaging impacts on the human population. For larger pests, capture and sterilisation has been used. But what if your pest is an insect?

How about spraying the crops with a wax powder coated with female insect pheromones? It obviously doesn't affect female insects, but for the poor males who pick up the particles and end up wafting female pheromones about the place...

http://www.bbc.co.uk/news/business-11694374

The headline? "How are sexually-confused insects helping small farmers?"