Which insect is categorized under the order Lepidoptera and is known for being a pest in agricultural fields?

The sod webworm is classified under the order Lepidoptera, which includes moths and butterflies. This order is characterized by insects that typically have two pairs of wings that are covered in scales. The sod webworm is particularly known as a pest in agricultural fields, as its larval stage feeds on grass and other crops, causing significant damage to turf and agricultural crops.

In contrast, the spider mite is an arachnid and belongs to the order Acari, not Lepidoptera. Grasshoppers belong to the order Orthoptera, and they have a different ecological role and behavior compared to Lepidoptera insects. Lastly, the root knot nematode is a type of microscopic roundworm classified under the phylum Nematoda and is known for parasitizing plant roots but does not fall under the order Lepidoptera.

Understanding the classification of these pests is essential for effective pest management in agriculture, as each group may require different approaches for control and prevention.