Not just insects. Vermin control is critical and often not very ethical. Here in Australia, rabbits and kangaroos can be a big issue for farmers too and are often killed to protect crops when they become too numerous. Ducks can be a big issue for rice farmers here and permits are issued to shoot ducks on crops.

I don’t speak French but my understanding of it is that french has a word for fan (of someone) and fan (that moves air) and translate used the wrong one.