
How to get the most out of your mealworms?
Your mealworms’ home will need the following conditions:
- Light: Keep your mealworms out of direct sunlight.
- Temperature: Temperatures between 70-78°F are ideal for active breeding/larvae production. Temps below 62°F slows reproduction. ...
- Moisture/humidity: Humidity around 70% degrees is ideal for mealworms. ...
What is the life cycle of mealworms?
In the larva stage, the mealworm’s life span is around 90-115 days. A mealworm’s life cycle lasts for a period that can range from 2 weeks to a few months. If the conditions are favorable and the temperature is warm, the pupa stage lasts for a few weeks. However, if it is very cold, this stage can last for a couple of months.
Why are mealworms called mealworms?
Why are they called mealworms? In fact, what we generally call “mealworm” is not a worm but it the larvae of a flour beetle. The Latin name of the beetle is Tenebrio molitor. It belongs to the Coleoptera order just as the ladybug or the rose chafer. The distinctive attribute of the Coleoptera is the hardened front pair of wing call ...
How long before mealworms turn into beetles?
Two or three weeks after the mealworm has pupated, a mealworm beetle will emerge The mealworms, which are the larvae of the darkling beetle, will need 3 months or more to go through their life cycle and reproduce to make new mealworms. They will change from larvae (mealworm) to pupae, then from pupae to mature beetles.

Why are my mealworms turning into beetles?
The mealworms prefer temperatures around 70 degrees, but you don't. At 70 degrees, this encourages the mealworms to consume rapidly, which then causes them to transition into the darkling beetle.
Do all mealworms turn into beetles?
Once they hatch, mealworms molt repeatedly over the course of several months until they are about 1.37 of an inch long and are ready to pupate. They remain as pupae for about one to three weeks before emerging as adult darkling beetles, ready to eat and reproduce.
What kind of bug does a mealworm turn into?
Mealworms are the larva form of the mealworm beetle, Tenebrio molitor, a species of darkling beetle. Like all holometabolic insects, they go through four life-stages: egg, larva, pupa, and adult. Larvae typically measure about 2.5 cm or more, whereas adults are generally between 1.25 and 1.8 cm in length.
What do mealworms turn into after?
Mealworm beetles go through four distinct stages of development: egg, larva, pupa, and adult. The amount of time it takes the insects to go through these stages depends on the temperature of their environment and availability of food.
Why are there black bugs in my mealworms?
They might be the little fuzzy larvae of the dermestid beetle, which tend to infest mealworm colonies if they are anywhere nearby. Warning, don't look them up unless you want to see a lot of half-clean skeletons - they are used to clean the meat off bones/out of skulls for those who keep skeletons for whatever reason.
Do mealworms carry parasites?
Mealworms effectively degrade biological waste and polystyrene foam [9]. The most common mealworm parasites include Gregarine spp., Hymenolepis diminuta and mites of the family Acaridae. Mealworms are model insects in parasitological research [10–12].
Do mealworms bite humans?
Do Mealworms Bite? No. Like superworms, mealworms do have mandibles, but they seem to be too small and weak to be noticed by humans or reptiles if biting is attempted. Mealworm beetles also do not seem inclined or able to bite.
Are mealworm beetles harmful?
Mealworms are not considered dangerous although they do infest and contaminate food. In many cases, they are fed to pets including reptiles and birds.
How long do mealworms stay alive?
Mealworms can be kept in the refrigerator for up to two weeks with very little maintenance. After two weeks, the mealworms should be removed from the refrigerator, and a small amount of Easy Water should be added to the top of the bedding.
Why did my mealworm turn white?
Mealworms must molt in order to grow. The skin of the mealworm splits down the back and the mealworm slides out. When this happens, the mealworm is white. This is a sure sign that the mealworm has molted recently.
How long does it take mealworms to turn into beetles?
The fully grown larvae (mealworms) are golden brown and a little over one inch long. The larvae come to the surface of the substrate, turn soft and plump, and then transform into naked white pupae that turns yellowish brown. The pupae don't eat or move much. After about 1-3 weeks the pupae metamorphose into beetles.
Can I release darkling beetles?
Can these beetles be released? No, they are native to South and Central America. They have the potential to survive and establish themselves in the wild in the southern United States. Unwanted Darkling Beetles should be frozen or fed to a pet reptile or amphibian.
How long does it take mealworms to turn into beetles?
Two or three weeks after the mealworm has pupated, a mealworm beetle will emerge. This is known as a darkling beetle. The egg stage typically lasts 7-14 days but low temperatures and humidity can lengthen double this incubation time.
Can I release darkling beetles?
Can these beetles be released? No, they are native to South and Central America. They have the potential to survive and establish themselves in the wild in the southern United States. Unwanted Darkling Beetles should be frozen or fed to a pet reptile or amphibian.
Are mealworm beetles harmful?
Mealworms are not considered dangerous although they do infest and contaminate food. In many cases, they are fed to pets including reptiles and birds.
How do I get rid of mealworm beetles?
Following tips might help you in case you have a mealworm infestation in your house.Identify the Source. ... Dispose Infected Food. ... Store Food in Airtight Containers. ... Use Night Light in Dark Areas. ... Maintain Cleanliness in the Kitchen. ... Collect Mealworms and Sell Them. ... Contact a Professional Exterminator.
Do Mealworms Turn Into Anything Else?
Mealworms go through a process called metamorphosis in order to turn into adult darkling beetles. This process consists of three stages: egg, larva...
What Kind Of Beetles Do Mealworms Turn Into?
Mealworms turn into the darkling beetle, Tenebrio molitor. This species of beetle is known for its dark coloration and its ability to thrive in dar...
Do Giant Mealworms Turn Into Beetles?
Yes, giant mealworms turn into beetles. They have four stages of life: egg, larvae, pupa and adult beetle. Giant Mealworms eat and grow until they...
Are Mealworms Maggots?
No, mealworms are not maggots. Maggots are the larval stage of flies, while mealworms are the larval stage of beetles. Both groups of insects go th...
Do Mealworms Bite Humans?
Mealworms have mandibles—jaw-like mouthparts used to bite, cut, and hold food. “They're capable of biting you but they're not being vicious or tryi...
How Do You Prevent Mealworms From Turning Into Beetles?
Mealworms are the larvae of darkling beetles, so preventing them from turning into beetles is a matter of preventing them from pupating and undergo...
Can I Keep A Mealworm As A Pet?
Mealworms are a great pet for children to have as they go through different life stages. They only take two to three months to complete their life...
How Long Is A Mealworms Life Cycle?
A mealworm's life cycle can take anywhere from four months to a year. The larval stage lasts for about three to four weeks, during which time the m...
How Big Is A Mealworm Egg?
A mealworm egg is about the size of a period at the end of this sentence. You would need to line up 20 to equal an inch.
What's The Difference Between Maggots And Mealworms?
Mealworms and maggots are both larvae of different insects. Mealworms are the larvae of the darkling beetle and maggots are the larvae of houseflie...
Why do mealworms grow?
A mealworm spends its time eating and growing in order to save up energy for the next transformation.
What is the life cycle of mealworms?
Life Cycle. Mealworms that birds, reptiles, and other animals love aren’t really worms. They are the larvae of darkling beetles. There are over 20,000 different types of darkling beetles and mealworms come from the species Tenebrio molitor. A darkling beetle experiences complete metamorphosis which means that it has four distinct stages of life.
How many times do worms molt?
Since it has a hard exoskeleton, the worm will need to molt and shed its hard outer shell in order to grow. Molts will occur ten to twenty times during this stage of life. A recently molted worm will be soft and white, but the exoskeleton will quickly harden.
How many stages of life do darkling beetles have?
A darkling beetle experiences complete metamorphosis which means that it has four distinct stages of life. The four stages are egg, larva, pupa, and adult. The amount of time a darkling beetle spends in each stage can vary greatly due to environmental factors like temperature, humidity, food, and water. Egg.
How long does a mealworm live?
The second stage of life lasts about eight to ten weeks and is spent as a brown larva. This is the stage where the insect is a mealworm. When first hatched, it is quite small but will grow to one to one and a half inches long.
How long does it take for a beetle to reproduce?
The beetle does have hard wings, but it is unable to fly. After about one to two weeks of adult life, beetles will begin to mate and reproduce. A few days after mating, female beetles will burrow into soil or substrate and lay eggs.
How long does it take for a white bean egg to hatch?
The egg is sticky and is quickly concealed by dirt, dust, and substrate. It will take around one to four weeks for an egg to hatch and the larva to emerge. Larva. The second stage of life lasts about eight to ten weeks and is spent as a brown larva.
How long does it take for a mealworm to develop?
Generally, the life cycle of a mealworm can take anywhere between four months and a year .
When do mealworms lay eggs?
The mealworm life cycle begins in late spring or early summer when female beetles seek dark, secluded areas to lay their eggs. When reproducing in buildings, they usually lay eggs in grain, meal, or flour containers. Females typically produce 300 white, bean-shaped eggs at once.
How long do mealworm beetles live?
Mealworm beetles are slow moving, but their ability to fly allows them to easily travel and infest new areas. Adults live between 3 and 12 months.
What color are mealworms?
Mealworms remain larvae until temperatures drop, when they transform into pupae to hibernate. Pupae are stout, C-shaped, and appear yellowish-white in color. They darken as they get closer to adulthood.
Can mealworms cause asthma?
The most worrisome concern for homeowners, pet store owners, and grain product employees, is the lengthy infestations and exposure to mealworm adults, pupae, and larvae that can produce allergic reactions such as headaches and asthma.
Larva
The larvae go through many instars (around 9-20). They are 2.5 cm long.
Pupa
Pupae are whitish, turning brown over time. This stage lasts for 3-30 days.

Overview
Relationship with humans
Tenebrio molitor is often used for biological research. Its relatively large size, ease of rearing and handling, and status as a non-model organism make it useful in proof of concept studies in the fields of basic biology, biochemistry, evolution, immunology and physiology.
Mealworms have generally been considered pests, because they feed on store…
Reproduction
The mealworm beetle breeds prolifically. Mating is a three-step process: the male chasing the female, mounting her, inserting his aedeagus, and injecting a sperm packet. Within a few days the female burrows into soft ground and lays eggs. Over a lifespan, a female will, on average, lay about 500 eggs.
After 4 to 19 days the eggs hatch. Many predators target the eggs, including reptiles.
See also
• Zond 5, a 1968 space mission on which mealworms were among the first terrestrial organisms to travel to and circle the Moon
• Organisms breaking down plastic
Gallery
• In a bedding of bran
• Mealworm detail
• A mealworm pupa with molted larval skin
• New adult
• Mature adult
External links
• Darkling Beetle/Mealworm Information. Center for Insect Science Education Outreach. University of Arizona.
• Mealworms and Darkling Beetles (Tenebrio beetle). FOSSweb.
• How to Raise Mealworms