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Mediterranean Flour Moth (Ephestia kuehniella)

Mediterranean flour moth of the Pyralidae family is considered a big nuisance to cereal grains, mainly flour, thus ill-reputed as a pest. They inhabit warm places like bakeries and flour mills, even resulting in damage to the machinery when the caterpillar’s silk spun gets clogged within.

Mediterranean Flour Moth
Mediterranean Flour Moth


Scientific Classification

  • Family: Pyralidae
  • Genus: Ephestia
  • Scientific Name: Ephestia kuehniella

Description and Identification


The larvae are pink or white with black spots all over, alongside a dark head. They start spinning silken tubes right from the beginning and remain there until maturation, which takes approximately 40 days.

Mediterranean Flour Moth Larvae



The pupa is reddish-brown, with the pupal phase lasting for 8 – 12 days.

Adult Moth

Sexual Dimorphism: Present but not prominent

Since they are protogynous (reproductive organs of females maturing before than males) the first moths of the seasons spotted are the females as they appear earlier than their male counterparts.

Color and Appearance

Forewings: When opened, it is gray with black markings running through the center in a zig-zag pattern. The wings are the same gray color with black and white lines running parallel in a zig-zag manner when closed

Hindwings: When opened, the hindwings have an off white appearance. When closed, it is gray, with the white portion barely visible.

Average Wingspan: 2 – 2.5 cm

Flight Pattern: Rapid and zig zag

Season: March – September


The eggs appear small and white, mostly laid inside a food source like flour or any waste grains.

Quick Facts

Other NamesMill moth, flour moth
DistributionParts of Europe particularly Germany, and Great Britain, as well as North America and Australia
HabitatIn bakeries, flour mills, and warehouses
PredatorsParasitic wasp, and a particular bacterial genus (Wolbachia)
Lifespan of Adults1 – 2 weeks
Adult DietDo not eat because of their short lifespan

Did You Know

  • They have a wide range as mentioned above. Their existence was recorded in Germany for the first time in 1879, while in Australia, North America, and Germany, they occurred much later in 1980.
  • Some of the few control measures include cleaning cracks, and crevices and using traps to catch them, mainly the male moths.
Mill Moth


Mediterranean Flour Moth Picture


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