Why Are There Little Bugs In My Flour?

A weevil is a tiny bug that eats things like beans, grains, nuts, cereal, and flour. Weevils lay their eggs inside the food, unlike other pantry pests that only consume food. When these eggs hatch, the larvae continue to consume until they are completely grown.

The exterior is where weevils enter the house. Others can infiltrate your home through cracks and gaps in your walls or windows, while some may be present in the dry groceries you purchase at the grocery store. When the temperature starts to cool off, these bugs start looking for food sources in warmer environments because they typically eat food and plants outdoors.

When these bugs are fully matured, they can be as little as 1/16th of an inch, making it nearly hard to find them in your food before it is too late. Although these little insects are physiologically safe for both people and animals to eat, it is not recommended to eat any food that has been contaminated.

Six natural tips to keep flour bugs away:

Deep cleaning

Take everything out of your pantry and throw away any open containers and contaminated products. Before replacing your dry food that has been saved, vacuum the shelves and give them a thorough washing with white vinegar, hot soapy water, or a natural cleaning spray.

2. Employ suitable containers

The flour bugs can be warded off by storing your flour, sugar, cereals, and other grains in suitable storage containers. For optimal results, use jars and containers that are airtight.

3. Congeal

Put your flour in the freezer for four days if it hasn’t already been colonized by fully developed bugs. Eggs and larvae are killed by freezing, preventing them from growing into a full-fledged army. It’s an excellent practice to get into of freezing any dry foods that you bring home from the store as a preventative step.

4. Make use of an insecticide

For pantry pests, non-toxic pesticides are readily accessible. Children and dogs should be kept away from them until the smell goes away because they do produce fumes.

5. Organic barriers.

Bay leaves and garlic cloves are two all-natural solutions to repel weevils. To ward off these disgusting critters, scatter dried bay leaves and garlic cloves on your freshly cleaned shelves.

6. Make a call to the experts.

Call a pest control expert to come take a look if your weevil infestation is severe or you aren’t completely sure you are dealing with weevils.

Is it okay to feed weevils flour?

To say the least, it’s very disconcerting to witness movement inside your flour bag. You probably haven’t heard of weevils if you weren’t aware of this potential. These brown beetles are bigger than flour mites and typically have shimmering body hairs (via Pest Defense). Unfortunately, it is entirely feasible to ignore these bugs until after using flour that has been contaminated. That indicates that you might have consumed some of these bugs, indeed. You can calm yourself a little despite how revolting this may seem since there is some good news.

You don’t need to be concerned of coming into touch with weevils because they don’t sting or bite, and it’s important to note that they are not poisonous. These little beetles are safe to eat, despite the fact that you probably don’t want to eat weevils. Since heat destroys both weevil eggs, larvae, and adults, using weevil-infested flour for cooking or baking ensures that it will be heated to a degree where it is safe to eat again (via Grove).

Preventive measures are essential because, of course, few people are likely to be thrilled about the idea of devouring weevils.

How do insects enter flour?

The broken pieces and dust from grains that accumulate in sacks of grains, flour, cereal, and pasta are fed on by flour beetles. The pests typically enter packaging at distribution centers or grocery stores and are then transported inside these infected goods into households. Flour beetles may then spread to other pantry items.

One of the most frequent pests discovered in stored goods is the flour beetle. They produce an offensive smell and frequently aid in the development of food mold. Additionally, they contaminate packaged goods with feces and shed skins. Over time, infestations of the flour beetle can make entire cabinets full of pantry goods unsafe for consumption.

Small tubular beetles can be an indicator of activity if they are found within or close to stored goods.

Adult flour beetles can enter products that seem to be sealed by crawling inside. On a shelf, infestations can quickly spread from one product to a variety of others. Products that are infected can be moved about by people.

The beetles cause flour to lose its color and take on an unpleasant odor as they consume.


The confused flour beetle (Tribolium confusum (duVal)) and the red flour beetle (Tribolium castaneum) are two of the most prevalent flour bugs (Herbst). Small beetles, like these.

The antennae of these two beetles differ from one another. Since these insects are so tiny, a magnifying glass is typically needed to see these distinctions.


They are typical in both grocery stores and residences. Mills and food processing industries are also infested.

There are various species of flour beetles. The black flour beetle, fake black flour beetle, broadhorned flour beetle, slenderhorned flour beetle, depressed flour beetle, smalleyed flour beetle, and longheaded flour beetle are a few of the other flour insects. These are less frequent than red and confused flour beetles.

Asia is where the red flour beetle originated. The South of the United States is where it is most prevalent. The red flour beetle can fly well. It occasionally flies into houses from fields.

Red Flour Beetle vs. Confused Flour Beetle

Many people believe that the confused flour beetle was mistaken for the red flour beetle, which is how it earned its name. Africa is where the confused flour beetle originated. It is one of the most significant pests of grocery shops and residential kitchens in the United States. Despite having wings, it usually doesn’t fly.

Reproduction & Life Cycle

Whole grains are not attacked by flour beetles. Eggs are immediately laid on goods like flour, cereal, dry pet food, and others by the female beetle. Each day, the females lay a few eggs in the food that she is consuming. Egg laying may continue for several months. In meal or flour, the eggs are difficult to see.

The larvae emerge and start to consume the substance on which they hatched. Larvae range in size from 4 to 5 mm. From egg to adult, flour beetles can grow up in as little as seven weeks. There may be four or five generations every year in warm conditions.

How may flour mites be avoided?

It will be identical to handling any pantry pest to deal with a flour mite problem. Inspection, identification, removal, cleanup, and continuous prevention will be the main tasks involved. In a home kitchen, chemical treatment shouldn’t be required to solve a flour mite problem.

Follow these instructions to permanently solve your pantry mite problem if you’re experiencing one!

Inspect, Identify and Remove Potential Sources

Like many other pantry pests, flour mites are carried into the house on bread, cereals, flours, dried fruits, and other foods that are kept in storage.

How do bugs enter tightly sealed containers?

Birdseed, dry pet food, decorative corn, dried flowers and plants, garden seeds, potpourri, and rodent baits are more things that could be contaminated.

The majority of the time, pantry pests infest products that have already been opened, but they can also infest packaging made of unopened paper, flimsy cardboard, plastic, foil, or cellophane. They could creep in via folds and seams or nibble their way inside packaging.

An contaminated package contains multiplying insects that can spread to other foods stored there as well as in other parts of the house.

Infested products may contain all insect life stages (egg, larva, pupa, and adult) at the same time.

Where do they come from?

From the time of production until it reaches your home, a stored food product may be contaminated. However, houses or grocery stores are where kept food is most prone to get contaminated. The majority of pantry pests are also found in grain that has been stored outside.

Food products that have been stored for a long time are more likely to become infested. But food can get infected at any age.

The flour weevil is not a real weevil, despite its name. The red flour beetle or confused flour beetle is most likely the insect that is commonly referred to as the flour weevil.

Flour beetles have an ovoid form and a shiny color. They are about 3 to 4 mm long and frequently have a reddish brown appearance. The flour weevil has a pitted thorax like many other beetles do. The forewings also have vertical grooves.

Both the red flour beetle and the confused flour beetle are frequently confused with one another. Although these two species appear and behave similarly, it is feasible to tell them apart by looking at their antennae. While red flour beetles have antennae with oddly big segments, confused flour bugs have proportionate antennae. In addition, the red flour beetle’s forewings have shallower grooves than the confused flour beetle’s.


Eggs are laid in food or in cracks in food packaging by the female beetle. After hatching, the larvae enter the product to consume. These larvae are frequently discovered in flour and are known as “weevils. thus the name “bread weevils.

All flour beetles have six legs and a light brown body as larvae. Beetles are capable of maturing into adults in as little as one month. Although some specimens can live up to three years in warm, humid environments, the average lifespan is one year. Compared to the red flour beetle, the confused flour beetle develops more slowly.

Signs of Infestation

Adult sightings unmistakably point to action. Red flour beetles are eager to fly and will pursue lights. Live adult beetles, fragments of deceased adult beetles, and larvae are frequently found on infested products. Even the taste and odor of the product may be disagreeable.

More Information

Common household items like cereals, pastas, cake mixes, powdered milk, and cornstarch contain flour “weevils.” Whole grains cannot be consumed by them, but they may be discovered infesting them to feed on the dust, powder, and broken kernels that are spread throughout. The inedible grains that host flour beetles may contain feces, molted skin, or carcasses. Infected grains may also release unpleasant scents before an infestation is found.

Can flour mites cause you harm?

Weevils and flour mites are safe to handle because they don’t bite, sting, or poison. But are flour mites or weevils hazardous if you consume them? If you consume weevil-infested flour, they won’t likely cause you any harm, so don’t worry if you previously utilized tainted goods. The high temperatures would have helped to have made the flour safe to eat if you were utilizing products in baking. However, it is not advised to do this frequently. It’s important to throw away any products containing mites or weevils right away and to take action to eradicate the infestation.

If you used a product that was contaminated, it’s likely that flour mites may spread mold and generate fungal spores, which could make people ill. Another possibility is an allergy to mites, which can itch the skin and, in extremely rare circumstances, if swallowed, cause swelling of the throat and breathing difficulties. Call a doctor right away to get medical help in this situation.

Must I be concerned about weevils?

Whether in the larval or adult stages, weevils pose little threat to either people or pets. They can be consumed with any meal they have contaminated without harm, despite the fact that it might not taste good to you. Weevils are most problematic for food producers, who frequently need to take measures to keep them out of crops and production processes. Weevils occasionally assist humans by acting as test subjects to evaluate whether pesticide residue is present in harvested grains. Pesticides are present if weevils consume the grains and perish.

From where do flour mites originate?

The most common way for this species of mite to enter a home is through contaminated foods such flour, rice, cereals, pet food, and dried fruit. They are also present on freshly painted, moist walls.

Can weevils enter tightly sealed containers?

You might want to make an investment in a few airtight containers if pantry bugs are “bugging” you. We’ll explain why pantry bugs are a prevalent issue in this first section and how airtight containers might help keep them out.

Can Weevils Get Into Airtight Containers?

Your food will stay fresh and the possibility of pantry pests is eliminated with airtight containers. Weevil entry into an airtight container of good quality is thus virtually impossible.

If you see any bugs in your airtight container, there probably were microscopic weevil eggs in your food before that. Over the course of their life cycle, mothers of weevils can lay hundreds of these eggs in grain kernels.

Unfortunately, young weevils are hard to see at this stage of their growth. Typically, it takes six months after the mother weevils have laid their eggs before you will detect weevils growing in your dry goods.

Can Weevils Get Into Sealed Packages?

Yes, pests like weevils can easily enter tightly sealed containers. Bugs frequently gnaw their way into plastic or cardboard packaging. The areas of your packages that are not lined make it simple for bugs to jump inside.

How Do Bugs Get In Sealed Containers?

Most frequently, bugs enter cardboard or plastic containers by tiny holes made by their razor-sharp mouths. This is particularly true with containers with sharp corners, like baking mix cartons.

If the bugs don’t eat their way inside the packages, they’ll probably squeeze through the smallest gaps. Since many of these pests are only a few millimeters long, they can easily fit through small gaps.

How can weevils be avoided?

There are two ways weevils might enter your home. The first way is through tainted groceries you bring home from the supermarket, and the second way is via access points in your neighborhood. Seal any potential entrance points to ensure that they won’t have access to the latter choice. Check your windows, doors, window screens, vents, and pantry for cracked or ripped weather stripping. Use caulk to seal them.