Flour mite

The flour mite (Acarus farris) belongs to the order Sarcoptiformes and the family Acaridae. It is considered one of the most destructive pests of stored agricultural products, capable of causing significant economic losses in facilities where environmental control is poorly managed.

This pest primarily infests grain crops, flour, cereals, oilseeds, legumes, dried fruits, and various animal feeds. Within storage facilities, it thrives on products with high moisture content, which provides an optimal environment for its rapid feeding and colonization.

The biology of the flour mite is characterized by a rapid development cycle, typically taking about two weeks from egg to adult under conditions of 20–25°C and relative humidity above 65%. In unfavorable conditions, the mite can enter a specialized resting stage known as a hypopus, which is highly resistant to environmental stressors.

Damage is caused by the mite consuming the germ of the grain, rendering it non-viable for sowing, and by contaminating the stock with excrement, cast skins, and dead mites. Infested produce often develops a distinctive, sickly-sweet odor and can become toxic to livestock or hazardous for human consumption.

• Drying grain to a safe moisture level (typically below 14-15%).
• Rigorous sanitation of storage facilities to remove all grain residues.
• Disinfestation and fumigation of empty warehouses before new harvests.
• Routine monitoring of grain bulk for signs of pest activity.
• Maintaining airtight storage conditions to prevent re-infestation.