In the event of a Larder Beetle infestation, the first areas to check are those where dust, animal fur, and food residues can accumulate (behind and under appliances, for example), because the insects consume animal fiber (protein). If only adults are found, local application of Maheu&Maheu Crawling Insect Killer
around room perimeters and door and window frames should be enough, seeing as the insects are getting in from outside.
If larvae are found, you will also need to use Maheu&Maheu Insecticide Dust
behind power outlet and switch cover plates and around pipes and electrical wiring where they enter walls. More serious infestations require intervention in the attic area where the Larder Beetle finds its main source of food—the Cluster Fly—which makes its way into our homes in fall and spends the winter indoors. Spray the same insecticide dust into the attic, preferably with an electric sprayer. That way you can be sure the powder, which is very volatile, will cover every inch and corner of the attic. It is also strongly recommended you apply crawling insect killer under the insulation near pipes and wiring that descend into the house.