Mediterranean Flour Moth

Mediterranean Flour Moth

Mediterranean Flour Moth

Size: Up to 5/8 inch in length; wingspan less than 1 inch.
 
Color: The front wings are a pale gray with transverse black wavy bars.

Behavior of the Mediterranean Flour Moth

The female deposits her eggs in any suitable food material and usually fastens them to the food particles. The young larva spins silken tubes constantly and spends its time in these tubes feeding. The silk causes balls of form, which can clog machinery in flour mills, necessitating downtime to clean the machines. The larvae may pupate in a cocoon within the flour or on the surface of the flour. They may also pupate in some crack or crevice either within or without a cocoon, often migrating from the food source in search of a pupation site. These larvae are therefore commonly seen significant distances from the breeding source. The life cycle from egg to adult can be completed in four to six weeks in heated buildings and six or more generations per year can occur. The adult moths are active fliers and fly in a very rapid zigzag fashion.
 
This moth is a significant pest of flour and is a serious pest of mills and warehouses. It also infests nuts, chocolate, seeds, beans, biscuits, dried fruits and stored foods of many kinds. They have even been found feeding in brood combs of honeybee nests. Mediterranean flour moths are not uncommon in supermarkets, drug stores and convenience stores where it can be found infesting chocolate, birdseed and pet foods. It may also be found in restaurants, homes and other end-users of food products.
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