Tenebrio molitor

General View

Tenebrio molitor is a tenebrionid coleopteran frequently raised as a food insect, a source of protein for other animals and, in some contexts, as a simple biomass production system. For domestic management, the central point is not "a nest", but cycle control, humidity, ventilation, hygiene and functional phase separation.

Taxonomic Classification

• Kingdom: Animalia
• Phylum: Arthropoda
• Class: Insecta
• Order: Coleoptera
• Family: Tenebrionidae
• Genre: Tenebrio
• Species: Tenebrio molitor

Life Cycle

• Egg
  • Small, white and difficult to see on the substrate.
  • It is dispersed in the fine material and bran.
• Larva
  • Longest phase and normally the most abundant in management.
  • And the phase of greatest interest as live food.
  • It goes through several seedlings and varies greatly in size.
• Pupa
  • Immobile phase, white to cream at first.
  • It is the most vulnerable phase to bites and cannibalism.
• Adult
  • Dark brown to black beetle after hardening.
  • Responsible for reproduction and new posture.

Technical Management Reading

• The system works best when treated as a phase-based biological production line, not as a single indistinct pot.
• The base substrate usually serves at the same time as:
  • floor;
  • shelter;
  • dry food.
• The biggest limitation in home-brewing is usually wrong humidity, not a lack of dry food.
• Excess water favors:
  • mold;
  • fermentation;
  • mortality;
  • mite;
  • rapid degradation of the substrate.
• Insufficient humidity reduces:
  • growth;
  • efficient skin exchange;
  • general vigor of the batch.

Recommended Setup

• Container:
  • smooth inside;
  • dry;
  • well ventilated;
  • with secure lid and ventilation that does not cause stuffiness.
• Substrate/dry food:
  • bran, oats, ground feed or similar dry combinations.
  • Sufficient layer to allow partial burial of the larvae.
• Shelter/surface:
  • corrugated cardboard or simple dry structure can increase usable area for adults.
• Humidity:
  • offered indirectly, normally via vegetables in small portions.

Practical Feeding

• Dry base:
  • wheat bran;
  • oat;
  • safe and clean dry mixes.
• Wet source:
  • small slices of carrot, chayote, potato or other firm vegetable source.
• Professional rule:
  • little humidity at a time;
  • quick removal of leftovers;
  • never leave vegetables to deteriorate for several days.

Phase Separation

• For productivity and clean reading, the ideal is to work on at least three fronts:
  • main batch of larvae;
  • separate pupae;
  • breeding adults.
• Separating pupae is especially valuable because:
  • reduces cannibalism;
  • improves the emergency rate;
  • makes it easier to know if the cycle is running.

Environmental Working Range

• Warm and stable environment favors faster growth.
• Colder environment slows down metabolism and development.
• The most common practical error is to leave:
  • stuffy heat without ventilation;
  • or moisture accumulated at the bottom.
• Partial darkness and low disturbance usually favor more stable behavior.

Healthy Lot Signs

• Active, firm larvae with relatively wide distribution on the substrate.
• Progressive presence of pupae and then adults.
• Absence of strong odor.
• Substrate dry to the touch, without sticky or moldy spots.
• Moist vegetables being consumed without rotting in the system.

Signs of Problem

• White, green or gray mold on the substrate or vegetables.
• Sour, fermented or heavy smell.
• Condensation on the walls.
• Serial deaths after supply of moisture.
• Excessive chewed or disappearing pupae.
• Obvious presence of mites.

Professional Reading

• A well-run small Tenebrio molitor farm depends more on a clean and predictable routine than on sophistication.
• If the objective is continuous reproduction, separating phases early greatly improves system governance.
• If the main objective is just to keep the lot alive in the short term, the most important thing is:
  • good quality dry substrate;
  • small and renewable wet source;
  • ventilation;
  • zero excess manipulation.

Relationship with the Vault

• Associated project: Criacao 6 Project - Tenebrios Farm