Brown house moth

Systematic position. The brown house moth, scientifically known as Hofmannophila pseudospretella, belongs to the order Lepidoptera and the family Oecophoridae. It is a widespread cosmopolitan species that has successfully adapted to human-made environments, commonly infesting domestic houses, food warehouses, and agricultural storage facilities.

Crops affected. This pest is a polyphagous insect. Its larvae feed on a wide variety of plant-based and animal-based materials. In the agricultural sector, they pose a significant threat to stored grain, seeds, pulses, dried fruits, and nuts. They are also known to occasionally damage fabrics and organic materials stored in the same facilities as grain crops.

Biology and life cycle. The development cycle of the brown house moth is heavily influenced by environmental conditions, particularly temperature and humidity. Females lay eggs in crevices, wall cracks, or directly onto the food substrate. The larvae are notably resilient and capable of surviving in various conditions, which allows the population to thrive in poorly managed storage areas over long periods.

Nature of damage. The damage is exclusively caused by the larval stage. Larvae bore into grain kernels, consuming the internal starch and embryo, leaving behind silk webbing and frass. This causes significant loss of stored product mass and quality. Contamination with webbing and excrement often facilitates the growth of mold and secondary pests, leading to further degradation of the stored lot.

Protection measures. Effective control of the brown house moth relies on rigorous sanitation and monitoring practices.

• Regular removal of spilled grain, dust, and debris from storage areas.
• Maintaining low moisture content and cool temperatures to inhibit larval development.
• Installation of pheromone traps to monitor and reduce adult moth populations.
• Professional fumigation of grain storages if high levels of infestation are detected.
• Ensuring proper structural maintenance to prevent the entry of moths from external sources.