This is great technology, a sustainable idea.
Acoustic Larvicide is a technique where mosquito larvae are killed by rupturing their internal air bladders with acoustic energy. Their air bladders are resonant and therefore susceptible to acoustic energy in the octave from 18 kilohertz to 30 kilohertz. When sound at these frequencies with sufficient energy is put in the water the mosquito larvae instantly die.
This company, New Mountain Innovations appears to be the leader of this idea.
Facebook Page of Mosquito Abatement testing acoustic larvicide facebook.com