Oh my. One swarm is ~2400 square kilometers/~930 square miles, and could contain up to 200 billion locusts. And moving at 150km per day. Madness. You can understand why various cultures have viewed them as a punishment from god.
Here's this quote from https://www.nationalgeographic.com/animals/invertebrates/gro...: "Each locust can eat its weight in plants each day, so a swarm of such size would eat 423 million pounds of plants every day." This is describing a swarm a "mere" 460 sq miles in size.
That's unbelieveable... I can't imagine that there's any real way to control swarms that large, and the idea of burning the entire country clean to starve them out seems a bit counterproductive.
There's a good scene depicting a locust swarm in Things Fall Apart.
The traditional village that is the subject of the (fictional) story sees swarms as a blessing -- they may eat crops, but you can harvest and eat the locusts themselves, and there are so many.
https://www.theguardian.com/world/gallery/2020/jan/24/billio...