- Colour Darker brown or black
- Size From 3 mm to 5 mm long
- Description Oval and may appear mottled. Wing cases are covered in hairs, with brown/red bands.
- Notes Larvae are yellowish-white with tufts of hair lining their body. They get darker as they mature.
Why do I have warehouse beetles?
While adult warehouse beetles eat nectars, pollens, dead insects, and dried animal carcasses, their larvae feed on a wide range of food products, including cereals, seeds, cornmeal, dried pet food, spices, pasta noodles, cookies, candy, and milk powder.
For this reason, they are often found in home pantries, flour and feed mills, warehouses, dried milk factories, stored-grain facilities and distribution centres, and processing plants. Warehouse beetles have even been known to infest the nests of bees, rodents, and birds.
Sometimes, infestations start when adult beetles feed on insect or animal carcasses found in warehouses and distribution centres, before moving on to the products that are manufactured or stored there.
How worried should I be about warehouse beetles?
Warehouse beetle larvae can wreak havoc in pantries and businesses, chewing through most protective wrappings, including plastics and aluminum foil, and ruining food products. In homes, this can leave them inedible. In businesses, this can have a serious financial impact.
The setae, or shape hairs, on the body of the larvae can also cause gastrointestinal irritation in infants, children, and susceptible individuals, resulting in vomiting and diarrhea. For extremely sensitive individuals, the hairs can also cause an allergic reaction.
You can use pheromone traps and appropriately labelled insecticides to control minor infestations. But warehouse beetles are cunning survivors, with larvae actually delaying development into adult beetles if conditions are less than favourable. This means it's essential to undertake a long-term, integrated pest management program to truly eradicate them.
How can I prevent warehouse beetles invading?
Monitor and inspect all possible food sources, Thoroughly vacuum cabinets, shelving, and crevices, Use stored foods with earlier expiration dates first, Do not mix older food products with newer ones, Store food in glass jars with securely fastened lids
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