The land was corrupted. — Rather, as in the margin, destroyed. Kalisch observes, “These insects” — i.e., the kakerlaque (Blatta Orientalis), “really fill the land, and molest men and beasts; they consume all sorts of materials, devastate the country, and are in so far more detrimental than the gnats, as they destroy also the property of the Egyptians.”
Related Commentaries of Exodus 8:24
Exodus 8:24
24 And the LORD did so; and there came a grievous swarm of flies into the house of Pharaoh, and into his servants' houses, and into all the land of Egypt: the land was corruptedf by reason of the swarm of flies.