Exodus 10:15

The land was darkened. It is not quite clear whether the darkness here spoken of was caused by the locusts in flight or after they had settled down. Locusts usually come in such thick clouds that they obscure the light of the sun and often turn noonday into twilight. It is also true that their brownish bodies and wings darken the ground once they settle to earth. The latter explanation is more probable (see Joel 2:2).

All the fruit. Although injury to fruit by the hail is not expressly mentioned in the account of that plague, it is implied (see Ex. 9:25). Locusts generally devour green crops, plants, and leaves first and then set to work upon such harder materials as reeds, twigs, and the bark of trees. In Egypt the principal fruits would be figs, pomegranates, mulberries, grapes, and dates.

Not any green thing. Modern observers state that the settling of a swarm of locusts for but half an hour is sufficient to transform a fertile region into a temporary desert.

After the locusts have passed, nothing remains but the roots, stems, and thick branches. The appearance of a region so devastated is similar to what it would be if fire had swept through it (see Joel 2:3).