Which of the following is true about polyurethane biodegradation in insects?

• A. Black soldier fly larvae can break down polyurethane using gut microbes.
• B. Mealworm larvae can break down polyurethane using gut microbes.
• C. Silkworm larvae can break down polyurethane using gut microbes.
• D. Wax moth larvae can break down polyurethane using gut microbes.

Answer: (A)

Polyurethane biodegradation in insects hinges on the gut microbial community breaking down the polymer into smaller, usable molecules. In black soldier fly larvae, evidence shows that their gut microbes produce enzymes capable of depolymerizing polyurethane, turning the tough polymer into simpler compounds that the larvae can metabolize. When these larvae are exposed to polyurethane-containing substrates, researchers observe both the insects’ continued growth and signs of chemical breakdown in the polymer, such as reduced mass and identifiable degradation products, indicating true chemical degradation rather than just physical shredding.

While other insects have been explored for polyurethane degradation, the strongest and most consistent demonstrations come from the black soldier fly larvae. This makes the idea that they can break down polyurethane via gut microbes the best-supported example, reflecting how insect-microbe partnerships can expand the range of materials that organisms can utilize.