In complete metamorphosis, which stage is typically most vulnerable?

• A. Egg
• B. Larva
• C. Pupa
• D. Adult

Answer: (B)

In complete metamorphosis, the life cycle includes four distinct stages that differ in how easily pests can be controlled. The larval stage is typically the most vulnerable because these insects are actively feeding, which makes them more exposed to pesticides and baits. Their bodies are softer and less heavily armored than the adults, so toxins are absorbed more readily. Eggs are protected by a tough shell and are stationary, making them harder to reach with treatments. Pupae are immobile and often encased in protective coverings, shielding them from many control measures. Adults can fly away and disperse, reducing the effectiveness of localized treatments. So, targeting the larval stage often yields the most immediate and practical control in pest management.