Farmed Insect Welfare: Standards for Mealworm Production

Mealworm (Tenebrio molitor) farming is growing rapidly for food and feed applications, and developing welfare standards requires applying precautionary principles given uncertainty about insect sentience.

Key Facts

Mealworms are the larvae of the darkling beetle, widely farmed for food and animal feed
Global mealworm production capacity is expanding rapidly with production facilities in Europe and Asia
Overcrowding in mealworm production increases mortality and cannibalism, suggesting stress
The temperature at which mealworms are killed (typically freezing or boiling) affects the rate of death
Scientific debate continues about the degree of sentience in insects, with precautionary approaches recommended

Welfare Considerations

Mealworm welfare standards are at an early stage of development, reflecting genuine uncertainty about insect sentience rather than certainty that they do not suffer. The precautionary principle suggests that where there is meaningful evidence of nociception and stress responses, practices should minimise potential suffering even without conclusive proof. Key welfare improvements include maintaining appropriate temperature and humidity, avoiding extreme overcrowding, and using the most rapid killing methods available. As evidence accumulates, standards should be updated accordingly.

What You Can Do

Support organisations researching insect sentience and welfare to build the evidence base
Look for insect food products from producers using welfare-aware production practices
Engage with insect farming certification bodies to include welfare requirements in standards
Support research into humane killing methods for insects that minimise time to death
Advocate for precautionary welfare standards for insect farming pending better sentience evidence