Which of the following pests is least likely to be found on interiorscape plants?

Sawflies are typically associated with outdoor environments and are more commonly found on landscape plants rather than interiorscape plants. They are a group of insects whose larvae often resemble caterpillars, and they tend to infest shrubs and trees, where their feeding can cause significant damage.

In contrast, spider mites, mealybugs, and aphids are more likely to inhabit interiorscape plants. Spider mites thrive in warm, dry conditions, which are common indoors, and they can quickly become a problem when plants are stressed. Mealybugs are prevalent on houseplants because they feed on the sap and can quickly multiply in an indoor environment where conditions can be more favorable for them. Aphids, also common indoors, can easily find hosts in the lush leaves of interiorscape plants and reproduce rapidly, causing harm to these plants.

Thus, the characteristics and typical habitats of these pests explain why sawflies are the least likely to be found on interiorscape plants, while the others have a notable presence in such environments.