Weed eaters were a specialized variant of the harvester created by Nod during the Second Tiberium War and the Firestorm Crisis.

Essentially a lightweight combine harvester on a tracked chassis, it is designed for collecting veins from veinholes and delivering them to the Tiberium Waste Facility for processing into chemical missile payloads.

The weed eater is basically a overhauled harvester, meant to collect the vein appendages of a veinhole, and is the only unit in the game that can do this. Weed Eaters have similar armour, health, and speed as a regular harvester and are required to fuel the Nod chemical missile.