Answer:
Yes, grasshopper is a threat to the crops because it is a herbivores.
Explanation:
Grasshopper is an insect which feed on plants so that's why it is called herbivores. It is also known as primary consumer in the trophic levels because they feed on producers. Grasshoppers destroy field crops which means that it is a pest. So for controlling pest, the farmer uses pesticides which kills only grasshoppers and the crop is not affected by the pesticides.