Thus the Lord Yahweh showed me: and, behold, he formed locusts in the beginning of the shooting up of the latter growth; and, behold, it was the latter growth after the king's harvest.
"In the beginning of the shooting up of the latter growth ... after the king's mowings ..." It is not clear, exactly what custom is referred to in the second phrase here; and the scholars have no agreement about what is meant; but the meaning is clear enough: the threatened locust plague occurred at exactly the right time to have done the maximum damage.