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The larder beetle


le dermeste du lard - Dermestes lardarius


Who's the larder beetle ?

Latin name: Dermestes lardarius
Order: Beetles
Family: Dermestidae
Size:6 to 9 mm
Colour:Brown or black with a yellowish band on the elysters
Location: kitchen and reserve
Period: all year


What you need to know about the larder beetle

le dermeste du lard - Dermestes lardariusAs the larder beetle fly (it is a beetle like the coccinel) it can go into the houses either to lay the summer or to shelter the winter. outdoors, this insect spends winter sheltered in tree bark cracks.

The male and female are almost identical. the larder beetle recognizes:
- its oval, relatively flat and hairy, dark brown or black,
- its 2 short antennas in the shape of a massue fixed on the head,
- to the black spots near the pronotum, the part of the chest that hides his head,
-to the broad strip of small yellowish, greyish or whitish hair that passes through the elysts. this strip has in its center 6 black points (three by elytre) of variable shape and size,
- to his two wings that hide under the elephants and allow him to fly,
- its length from 6 to 9 mm.

If adults prefer flowers, larvae feed on animal bodies. Since the dried bacon has become rare, this insect has adapted to other foods such as pet croquettes and frozen fat. but, the larder beetle can also feed on feathers, skins, hair, hair, hams, bacon, dried and processed or putrefied meats, cheese and wool. It also deals with museum specimens, dried insects and stuffed birds.

The blade of the bacon is detritivoreate and feeds on insects and dead animals (necrophage) present in the stored grain.

It can also infester protein-rich plant products. In general, it infests our food reserves. It has a preference for foods that contain oil, fat, animal proteins. However, it can stay for several weeks without eating.

The larder beetle frequently meets in the granaries, silos, warehouses and dwellings. it is also considered an important pest in the hens. it infests commonly and increasingly homes. Larvae are the most greedy and voracious, they are able to dig tunnels in our books, our woods, our tiles, our pipes, our materials, etc., thus weakening our homes.

The larder beetle is not dangerous to human health. He doesn't sting and doesn't bite. It does not transmit diseases. On the other hand, its hair may cause allergies and skin irritation in some people without severity.

Its reproduction and life cycle

The larder beetle is an invertebrate holometabole. it undergoes a complete metamorphosis: the egg, the larva, the nymph, and the adult. the larva will die four or five times before becoming adult

It mates in the spring or early summer. It is often at this time that it takes advantage of it to enter the dwellings, in search of suitable places for its reproduction. after absorbing protein-rich foods, the female lays, by groups of 6 to 8, 100 to 200 eggs in the form of banana. it deposits them directly on food intended for larvae or nearby. The larvae hatch is between 6 to 11 days. if the larder beetle is found in favourable conditions inside the buildings (between 15 and 30 °C and a correct hygrometry), it passes from egg to adult in about 40 days. the female can generate five or six generations per year.

In a dozen days, the larva leaves the egg. It then eats and takes the appearance that characterizes it: a body of about 13 mm covered with long hairs, a light brown complexion, and at the end of the abdomen, two small spines curved.

The male larva will pass through 5 mues before becoming adult. The female will pass through 6 mues. Once the larva matures, the larva will turn into a nymph. during this stage, the blade of the lard is still and is an easy prey for its predators. to ensure its safety, it sinks into food or moves to a safe place.

2 weeks after his transformation into a nymph, the larder beetle will become an adult. he lives more than a year when conditions are favourable to him.

Larve de dermeste du lard - Dermestes lardarius

How to eliminate the larder beetle ?

Often, the presence of the larder beetle is seen by:
- the infestation of food packages and cans of cans
- eggs in the form of bananas
- presence of larval exuvies (delayed worms-small hairy worms empty)
- presence of adult larder beetle fragments

Here is our advice to fight and eliminate this pest insect:
- eliminate all potential food sources and mainly all dried bodies ( rodents, flies, insects),
- pass the vacuum cleaner to eliminate dead skins, hair and hair that you lose daily,
- clean all traces of fat (kitchen, hood,),
- store your pet croquettes safely and discard all contaminated products,
- put thin grilles on the traps and ventilation mouths, cloak the cracks,
- carefully inspect the bouquets of flowers collected in your garden,

- clean the closets and apply insecticides. for this, the same method of cleaning as the food mite :

Method and a little elbow oil! :
1 Take a large trash bag and throw everything that is not in a fully hermetic box, even the products that seem impeccable.
2 Pass the vacuum cleaner in all corners and corners of the closet or reserve.
3 Fill a hot water basin + product dishes + disinfectant ( bio of course!). has the help of a brush, rub the whole closet without forgetting any corners.
4 When everything is dry, deal with our insecticide 4j diluted to 5% the whole closet (see 500 ml for 5 m2 of treated surface). To treat large surfaces, prefer this same insecticide but under its concentrated form. You will then make the dilution with water in a sprayer at 5% (50 ml of insecticide for 950 ml of water). the aerosol Insecticide Ecodoo or the flying insecticide Aries can also be used to treat all closed volumes (sheets, furniture, etc.).
All you have to do is put all your food back in the closets, but still in totally hermetic boxes.


The products you need against the larder beetle

Directly access the detailed product sheets to fight the larder beetle.

4J Plant Pyrethrum Insecticide Concentrate...

4J insecticide concentrate to dilute. Effective against a large number of crawling and flying insects in our homes. Bottles of 125,...
In stock

4J insecticide diluted 5% - All insects -...

4J insecticide diluted at 5% ready to use. With this concentration, you will destroy most flying or crawling insects very quickly....
In stock

*pae: ready for employment

This is what the larder beetle looks like in motion