I recall hearing when I was younger that mosquitoes were an outlier in the natural world. With most species, the balance of any food web would be pretty thoroughly disrupted by a major culling. As I heard it, this isn't the case for mosquitoes - if you could press a button and kill them all tomorrow, most ecosystems would be largely unimpacted.
Am I just making this up/misremembering it?
Edit: found a few sources.
Pro-mosquitocide:
http://www.nature.com/news/2010/100721/full/466432a.html
http://news.nationalgeographic.com/2016/02/160207-mosquitoes...
Anti-mosquitocide:
http://io9.gizmodo.com/what-if-every-mosquito-on-earth-went-...