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Mealworm Identification and Control in Utah

Correct identification is an important first step in pest control.


Dark mealworm adults are a dull black or very dark brown color. Their larvae grow up to about 1 1/4 of an inch in length and are smooth, cylindrical in shape and brownish to dark yellow in color.

Yellow mealworm adults are a shiny black to dark brown color. Their larvae grow up to 1 1/4 of an inch in length and are golden yellow in color with a smooth cylindrical shape.

The presence of dark or yellow mealworms indicate a lack of proper sanitation. Their eggs and larvae can cause gastrointestinal discomfort when ingested.

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Where do they lay their eggs
Where do they lay their eggs

Dark and Yellow mealworms lay eggs singly orin clusters in food sources. They prefer dark, damp and undisturbed environments. Their larvae are often seen migrating from infested areas.


Trenebrio spp.


Old or moldy grain, oats or seeds


Yes, they are attracted to light.

Thorn Pest Services Tips for keeping mealworms away

How To Get Rid Of and Prevent Mealworms
Pest control experts
  • Improve sanitation procedures in affected areas.

  • Dispose of infested food items.

  • Keep moisture low in food storage areas by imposing ventilation.

  • Inspect all incoming food items for pests.

  • Store food items in pest-proof containers and keep food in regular rotation.

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Pests can be difficult to control, but that’s what we are here for. We create a strategic plan to gain control of your problem and make sure we get results.

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We take a scientific approach to pest control. We start with an inspection and assessment to help us identify the pest, locate where they are, and create a specific plan for your property. Every home and business is different and requires a unique strategy.

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Proper pest management starts with a detailed inspection and assessment from an expert pest professional before treatment. Thorn Pest Solutions uses a three-step process rooted in science to eliminate pests with long-term results.

Assess Situation

First, we identify the root problem(s) with a site assessment. Pests are almost always an indicator of an environmental condition. This will determine the best actions to provide short and your long-term results against pests.

Execute Action Plan

Next, we develop a plan to fix the problems we discovered. This includes solving current pest issues, eliminating conducive conditions, and monitoring for future pest activity. Good pest management starts with a good plan.

Track Success

Lastly, we implement the solutions we developed including inspection, monitoring, and preventing future pest infestations. Good pest control requires a good offense and not just defense. Prevention is key.

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