Which insect is classified as a pest with chewing mouthparts?

The bollworm is classified as a pest with chewing mouthparts because this type of mouthpart allows the insect to physically bite and chew on plant material, particularly during its larval stage when it feeds on crops like cotton, corn, and tobacco. This feeding behavior can result in significant damage to the plants, making the bollworm a serious agricultural pest.

Chewing mouthparts are characteristic of many insects that cause direct damage to plants, as they can consume leaves, flowers, and fruits. The physical act of chewing leads to the removal of tissue, which can affect the plant's growth, yield, and overall health. In contrast, the other insects listed have different mouthpart structures suited to their feeding habits; for example, the blow fly has sponging mouthparts for consuming liquids, the big-eyed bug features piercing-sucking mouthparts for extracting fluids from prey, and the black widow spider uses fangs to inject venom and digest its prey externally. This differentiation is key in entomology, as understanding mouthpart types provides insight into the feeding behavior and potential impacts of various insect species.