Left: Feeding Grasshopper
Upper Right: Mandible
Lower Right: Labrum
Note how the labrum holds the leaf. The mandible has sharp teeth for fracturing leaves. The labrum has a notch (bottom) for holding a leaf
Grasshoppers eat plant leaves by biting off pieces small enough to ingest. Chewing leaves involves complex physical properties of both the grasshopper mouthparts and the leaf.
When a grasshopper or a person chews off a piece of leaf, the leaf must fracture. Leaves can resist fracture by…
Source: Living With Insects Blog