Mealworms

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Close-up image of a moth and a larva on a bed of brown grains. The moth is in the center with wings folded, and the larva is to the left. The grains have a textured, oval shape.

What do Mealworms Look Like?

Mealworms are the larval form of the mealworm beetle. They are worm-like in appearance and have a firm body that allows them to burrow. They are 1/2-3/4” long and their color changes from white to tan. As they mature, they develop stripes.

When are Mealworms Most Active?

Mealworms and the mealworm beetle are both nocturnal, but they can be active during the day.

What Attracts Mealworms?

These decomposing specialists are attracted light and areas that have moist decomposing materials like:

  • Decomposing animals
  • Decomposing/dead plants
  • Mulch
  • Grains
  • Seedlings
  • Where are you likely to find Mealworms?

    Mealworms are found in temperate regions all over the world. They usually live in dark, cool, and moist places (under rocks and logs, etc.).

    Are Mealworms Dangerous or Destructive?

    Mealworms have a positive effect on the ecosystem as they play a crucial part in the decomposing of dead insects, feces, dead animals and dead vegetation. But they can be very destructive if they get into a grain storage unit. Infestations of these pests in grain storage or processing plants usually results in all of the grain needing to be destroyed.

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