Gramoxone is a plant desiccant used to facilitate harvesting. Volunteer plants can be a problem, these can be controlled by using 2,4-D during the fallow period. During the complete bloom period. One and possibly two. Yes, damage from these is seen by reduced stands.
Damage also appears as notched leaves or cotyledons, wilting, and cut or dead seedlings.
They tunnel in the stalk and reduce yields, increase lodging losses, and increase the incidence of stalk rot diseases. Crop rotation as well as delayed planting can aid in prevention. Systemic insecticides can also be applied at planting. Seeds and they may tunnel in parts of the head. It is recommended that control be applied during the larval stage.