Angoumois Grain Moth

Facts, Identification, & Control

Scientific Name

Sitrotroga cerealella

Appearance

What Do They Look Like?

Grain Moth

Grain Moth image licensed under CC
  • Size: They are small in size with a front wingspan about 3/16 inches. Full-grown larvae are about 1/8 inches long.
  • Color: They are yellowish in color. Full-grown larvae are usually yellowish-white with a yellowish-brown head.
  • Characteristics: A very important distinguishing characteristic is a narrow projection that extends from the tip of their hind wing.

How Did I Get Angoumois Grain Moths?

Home infestations are rare, but the sudden appearance of Angoumois grain moths in a kitchen usually means these insects were inside grain prior to storage.

Because Angoumois grain moth larvae develop within corn or wheat kernels, infestations are tough to detect. These insects don't emerge from the seeds until they reach adulthood.

How Serious Are Angoumois Grain Moths?

Food Damage

These pests' feeding process results in the loss of all affected pantry goods. Angoumois grain moth larvae have an awful scent that can make other items stored with the infested foods unappealing or inedible as well.

Agricultural Damage

These pests are active at low temperatures, and may do damage during the winter months in many areas. Angoumois grain moths can cause serious damage to field crops and can be extremely costly to growers and producers.

Signs of Infestation

Angoumois grain moths are detected by the adults as they land on surfaces or fly around the home. They can also leave behind damaged food items.

How Do I Get Rid Of Angoumois Grain Moths?

What You Can Do

Angoumois grain moth prevention and control starts with a careful inspection to identify infested products. It is important to routinely check the walls and ceiling for the presence of larvae and pupae including:

  • Disposing of products that are infested.
  • Removing holiday decorations such as Indian corn or similar items.
What Orkin Does

Your local Orkin technician is trained to help manage Angoumis grain moths and similar pests. Since every building or home is different, your Orkin technician will design a unique program for your situation.

Orkin can provide the right solution to keep Angoumois grain moths in their place and out of your home or business.


Behavior, Diet, & Habits

What Do They Eat?

Adult moths do not feed on grains. Larvae feed on:

  • Corn kernels
  • Grains
  • Seeds
  • Wheat
Where Do They Live?

When found in homes, common places for these pests include:

  • Popcorn
  • Decorative ears of corn.
  • Decorative boxes of seeds.

Life Cycle

Stages

The complete life cycle (egg to adult) can be completed in as little time as five weeks.

  1. Egg: Eggs are laid on or near grain either in the field or during storage.
  2. Larval: Larvae then penetrate the kernel and continue to feed until mature, while creating and enlarging a cavity within the kernel.
  3. Pupal: When mature, the larvae eats a channel to the outside of the seed and spins a silken cocoon.
  4. Adult: They then pupate within the kernel and emerge as an adult moth.