Drugstore Beetles: Check your pantry food! Ecology, countermeasures, and extermination.

The drugstore beetle is a small, brown, beetle-like insect that sometimes pops its wings open and flies around with a buzzing sound. If you see them flying in your room or sitting on a windowsill, be careful! Check the stored food in your kitchen.

Drugstore beetles eat anything that is dried plant matter.

Drugstore beetles eat anything that is dried plant matter.They infest not only stored grains, flour, dried noodles, bread, biscuits, spices, and dried shiitake mushrooms, but also herbal medicines, tobacco, dried flowers, straw-core tatami mats, and buckwheat hull pillows.
The cigarette beetle has an egg stage of about 10 days, a larval stage of about 45 days, a pupal stage of about 10 days, and an adult lifespan of 10 to 30 days, with a lifetime egg production of about 100 eggs (at 25°C). The larvae are whitish and shaped like the letter "C".
They are brown in color and 2-3 mm long as adults. They are generally oval-shaped with a hard surface. Sometimes they pop their brown wings open and fly away.

If you find a drugstore beetle, check your food.

Are there any dried goods in your kitchen cupboards that have been left untouched for several months or longer?
It is easy to forget about food that can be stored for a long time, but that is exactly what drugstore beetles target. They can even infest ingredients you would never think would attract bugs, such as chili powder or curry powder.
If you find food infested with many larvae and adults, discard it immediately! That will usually solve the drugstore beetle problem.

They are often found on window frames, but that is not the source.

Even if you see two or three drugstore beetles on your window sill every day and look for the source near the window,the source is often actually in the kitchen.This is a common case.
Adult drugstore beetles are attracted to light (positive phototaxis). They don't like strong light like direct sunlight, but they love the soft light from a window. The beetles likely grew up in the kitchen and flew to the window frame in search of light.

Insecticides you can use on visible insects.

If a drugstore beetle infestation occurs,first address the source.Try to find the source where the larvae and adults are emerging and dispose of it; this will stop future infestations.
If you want to exterminate insects you see, please use "Iyana Mushi Kincho-l", "Iyana Mushi Muender".

Damage from Sclerodermus harmandi is decreasing.

Drugstore beetles themselves do not bite or sting people.However, the wasp that parasitizes the drugstore beetle, Sclerodermus harmandi, can sting people and cause persistent, intense itching.
In the 1970s, cigarette beetles infested the rice straw inside tatami mats (tatami beds) in large numbers, and the resulting increase in Sclerodermus harmandi led to frequent reports of people being stung. This damage has been decreasing since the 1980s. This is related to the shift in tatami bed materials to wood-based boards or polystyrene foam. Today, such cases are rare and almost never seen.