What is the term for the change of form from egg to adult in insects?

The term that describes the change of form from egg to adult in insects is metamorphosis. This biological process involves significant physical changes as insects transition through different life stages, typically including larval and pupal stages before reaching adulthood. Metamorphosis can be categorized into two main types: complete metamorphosis, which includes distinct egg, larva, pupa, and adult stages, and incomplete metamorphosis, which has egg, nymph, and adult stages without a pupal phase. Understanding metamorphosis is essential for pest management and pesticide application because different stages may require different control methods and timing for effective treatment.