Corn moth

The corn moth (Latin Haplotinea insectella) belongs to the order Lepidoptera, family Tineidae. It is a specialized pest of stored products that favors environments with high humidity where mold can develop, as mold is a significant component of the larvae's diet.

This pest damages a wide variety of agricultural products. Commodities at risk include stored cereals, legumes, flour, bran, oilseeds, as well as dried vegetables, fungi, and their processed products. It is frequently found in poorly ventilated storage facilities.

The biological development cycle consists of the egg, larva, pupa, and adult stages. The female lays eggs directly into the substrate or into cracks in storage containers. Larvae lead a cryptic lifestyle, spinning silken galleries through the grain mass, which contributes to the formation of clumps and increases humidity within the infestation hotspots.

The economic damage caused by the corn moth involves the direct consumption of stocks and contamination with waste products (excrement, webbing, and larval exuviae). Damaged grain loses its viability, becomes prone to self-heating, and is rapidly colonized by secondary pests and mold fungi.

Protection measures are based on prevention and strict storage condition control. It is recommended to:

• Perform regular cleaning and disinfestation of warehouse facilities.
• Maintain low moisture levels in the grain mass (below 14%).
• Use airtight storage containers whenever possible.
• Apply fumigation and aerosol treatments upon detecting infestation sites.
• Ensure continuous monitoring of temperature regimes in grain piles.