How many stages are there in the "incomplete" or "gradual" life cycle of certain pests?

The "incomplete" or "gradual" life cycle of certain pests is characterized by three distinct stages: egg, nymph, and adult. In this type of development, the young, known as nymphs, look similar to miniature adults and gradually develop into their mature form without undergoing a drastic metamorphosis. This developmental pattern contrasts with complete life cycles, which involve four stages: egg, larva, pupa, and adult.

In the case of the gradual life cycle, the focus is on the transformation that occurs as the nymphs grow and molt, becoming more like the adult stage with each progression. Understanding this life cycle is crucial for pest management and control strategies, as it affects the timing of interventions and the methods used to tackle pest populations effectively.