Which insect is NOT typically associated with damaging alfalfa?

The cabbage looper is not typically associated with damaging alfalfa. Alfalfa is primarily affected by insects that have direct feeding habits that target the plant's leaves, stems, or roots, leading to notable damage. Both the leafhopper and the alfalfa weevil are known for their detrimental impacts on alfalfa crops; leafhoppers can cause significant damage by feeding on plant sap, while alfalfa weevils typically feed on the foliage, leading to reduced plant vigor and yield. The velvetbean caterpillar also poses a threat to alfalfa since it can feed on the leaves and impact plant health.

In contrast, the cabbage looper is more commonly associated with other crops, particularly cabbage and similar vegetables, where it can cause more destructive feeding damage. Therefore, while the other insects are significant pests in alfalfa cultivation, the cabbage looper does not have the same level of association or impact on this particular crop.