There have been many theories floated as to how to stop the devastation caused by locust swarms. But to fully implement any such theory or plan we need to study the highly evolved locusts to understand how best to deal with them. We can no longer sit idle, we must stop the devastation to crops or we risk not having enough food to feed the growing human populations.

Indeed understood and well said. Now then, perhaps why Locusts Swarm is relevant in that if they swarm due to an internal harmonic or if these swarms are caused by a frequency, sound; such as infrasound, ultrasound or other sound, then manipulating this sound could cause the locusts to not swarm or stop swarming. Thus the answer to why they swarm may not be so intriguing, but it could possibly provide a solution to those: