Which set correctly lists the four life stages used in pest life cycle assessments?

Which set correctly lists the four life stages used in pest life cycle assessments?

• A. Nymph, Pupa, Egg, Adult
• B. Egg, Nymph, Pupa, Adult
• C. Egg, Larva, Pupa, Adult
• D. Seed, Sprout, Twig, Tree

Answer: (C)

Life cycle assessments for pests, especially insects that undergo complete metamorphosis, rely on four distinct life forms: egg, larva, pupa, and adult. Each stage represents a different biology, behavior, and vulnerability, which helps in timing controls and understanding population growth. This four-stage sequence—egg hatches into larva, larva becomes a pupa, and the pupa emerges as the adult—is the standard model used in pest studies. The option that uses a nymph would apply to pests with incomplete metamorphosis and isn’t the universal four-stage framework. The option listing seed, sprout, twig, and tree relates to plant growth, not pest development.

Life cycle assessments for pests, especially insects that undergo complete metamorphosis, rely on four distinct life forms: egg, larva, pupa, and adult. Each stage represents a different biology, behavior, and vulnerability, which helps in timing controls and understanding population growth. This four-stage sequence—egg hatches into larva, larva becomes a pupa, and the pupa emerges as the adult—is the standard model used in pest studies. The option that uses a nymph would apply to pests with incomplete metamorphosis and isn’t the universal four-stage framework. The option listing seed, sprout, twig, and tree relates to plant growth, not pest development.