Which of the following is an example of an insect pest with piercing/sucking mouth parts?

The correct answer is mealybugs, which are a classic example of insect pests that possess piercing/sucking mouthparts. These mouthparts are specialized structures that allow mealybugs to penetrate plant tissues and extract sap or other nutrient-rich fluids. This feeding behavior can lead to various plant health issues, including stunted growth, leaf yellowing, and overall decline, making them significant pests in horticulture and agriculture.

In contrast, webworms, beetles, and caterpillars exhibit different feeding strategies. Webworms typically feed by chewing on leaves, while beetles can have a range of mouthpart structures, many of which are adapted for chewing or scraping rather than piercing and sucking. Caterpillars, which are the larval stage of moths and butterflies, also possess chewing mouthparts, primarily for consuming plant foliage. Understanding the differences in mouthpart structures is essential for identifying pests and developing appropriate management strategies.