Lesser mealworm

The lesser mealworm (Alphitobius laevigatus), a member of the Tenebrionidae family within the order Coleoptera, is a significant pest of stored agricultural products. Frequently associated with poultry houses and grain processing facilities, this beetle is known for its ability to thrive in diverse environments where food sources are available.

The pest primarily targets cereal grains, flour, meal, bran, and various dry food items. In poultry industry settings, the lesser mealworm is infamous for infesting bedding and litter, where it feeds on spilled feed and manure. This presence not only affects the quality of the feed but also poses risks to animal health by potentially carrying various pathogens.

Its biological cycle consists of egg, larva, pupa, and adult stages. Adult beetles are small, dark brown or black, and highly mobile. They prefer dark, humid, and undisturbed locations for egg-laying. The larvae are voracious feeders and are often the life stage responsible for the most significant economic damage to both goods and building infrastructure.

Damage caused by this insect involves the direct consumption of products and extensive contamination with feces, cast skins, and secretions. Furthermore, in poultry facilities, larvae have been known to bore into structural foam insulation, which can cause severe degradation of building efficiency. These activities result in significant economic losses for producers.

Management strategies focus on a combination of rigorous sanitation and chemical control. Key measures include:

• Maintaining dry storage conditions to discourage development.
• Frequent cleaning of spillages and debris in warehouses.
• Using approved insecticides for surface treatments or space spraying.
• Implementing regular monitoring and trapping programs to assess population levels.