Four sorts of insects pernicious to all sorts of trees, corn, and herbs are here mentioned, which did succeed each other, and devoured all that might be a future support to the Jews; whence ensued a grievous famine for four years together, say the Jewish interpreters, though there is no cogent reason in what they mention for proof hereof. These insects might in the same year succeed each other, the one, as is usual, might come sooner, the rest successively, each in its season, and so spoil the springing of all things, which they did (I do believe) really; and though these might be emblems of some future devastation, yet it seems most agreeable to reason, and the context, that there should really have been such caterpillars and other vermin, and that they did devour all that was green; and though this is no where else mentioned, as I remember, in the sacred history, yet it is likely it was done, as here told, and as so done was a figure of some greater devastation made by foreign powers, as by Tiglath-pileser, Shalmaneser, Sennacherib, and Nebuchadnezzar.
Related Commentaries of Joel 1:4
Joel 1:4
4 That which the palmerworma hath left hath the locust eaten; and that which the locust hath left hath the cankerworm eaten; and that which the cankerworm hath left hath the caterpiller eaten.