First, the reasons why cockroaches appear may be as follows:

1. The room is too humid.

Being fond of warmth and tide is an important habit of cockroaches. It is not difficult to find that the kitchen is always the most seriously violated place, whether in restaurants, families, or on trains and ships. Even in the kitchen, they generally like to live near stoves and pools.

2. The room has its habitat

Cockroaches also live in groups.

It is often found that at a habitat, there are always as few as a few, and as many as dozens or hundreds of them gather together, which is mainly due to the lure of pheromones.

Both adults and nymphs of cockroaches can secrete an aggregation pheromone, which is secreted by rectal pad and excreted with feces. In places where cockroaches live, it is often seen that their feces are formed.

3. Oil and sugar scattered in the kitchen or other places attract it

Lang is an omnivorous insect with a wide range of foods. All kinds of food, including bread, rice, cakes, vegetarian and cooked food, melons and fruits, drinks, etc., especially like to eat fragrant, sweet and oily flour food.

Cockroaches have a habit of eating oil. Among all kinds of vegetable oils, sesame oil is the most attractive to them, so some places call them "oil thieves". Among sugars, brown sugar and maltose have the strongest attraction to them.

Second, measures to eliminate cockroaches

1. Clean up garbage and unused items, especially books, newspapers and magazines at home;

2. Check the underside and back of furniture, as well as hidden places such as false ceilings, air troughs and wire troughs;

3. Fill the cracks and crevices on the ceiling, wall and floor with non-thermal insulation materials for the best seal.

4. All cockroach remains and egg sheaths must be crushed and removed to prevent the egg sheaths from hatching. (1: the egg sheath must be burned; 2: flushed into the sewer)

5. Furniture should avoid using plywood or ceiling wall as far as possible, and should be made of aluminum, stainless steel, plastic and other materials, which is easy to wash and has no heat preservation effect, so cockroaches are not easy to survive. It's best to keep the furniture away from the wall, so it's not easy to hide cockroaches.

6. keep the residence dry and clean: delimit strict eating areas, and no food is allowed in except restaurants and kitchens. Attention should be paid to the cleanliness of the kitchen and bathroom, and no water accumulation is allowed.

7. Store food properly and thoroughly clean up food residues after feeding pets. (For cats at home, dog friends must pay attention)

8. Empty the trash can thoroughly at least once a day. Tie the mouth of the garbage bag before placing it.

9. Don't eat in bed.

11. Install screen doors, screens, or add detailed nets on the drainage holes; At night, the external drainage holes at home should be covered to prevent cockroaches from entering. Seal the holes left on the external wall, floor and platform for the pipes and wires of split air conditioning system to pass through or install the system.

coat a layer of vaseline with a width of at least 11 cm around the dry drainage hole to prevent cockroaches from crossing the hole; Install barbed wire with a mesh width of 2 mm on the drainage hole.

11. Place tools to kill cockroaches. Such as drugs.

Extended information:

Hazards of cockroaches:

Cockroaches can still be artificially infected with bacteria that cause cholera, pneumonia, diphtheria, rhinogangrene, anthrax and tuberculosis in Asia.

Cockroaches can carry many kinds of worm eggs, such as roundworm, hookworm, beef tapeworm, roundworm, whipworm and so on. They can also be used as intermediate hosts of Echinococcus moniliforme, Hymenolepis brevis, tumor tube and other nematodes.

Cockroaches can also carry many kinds of protozoa, four of which are pathogenic to humans or animals, such as Amima dysentery and Giardia enterorrhoea.

Experimental studies have confirmed that cockroaches can carry, keep and excrete viruses, including Coxsackie virus and poliovirus.

cockroaches can also carry fungi. Many kinds of fungi, including a large number of Aspergillus flavus, have been isolated from cockroaches captured indoors in Nanjing and Nantong, Jiangsu Province.

Although cockroaches carry a variety of pathogens, it is generally believed that pathogens cannot reproduce in their bodies and belong to mechanical transmission media.

However, due to their extensive invasion and miscellaneous eating habits, they can not only move in garbage, toilets, washrooms and other places, but also feed on food, so they can not be ignored in causing intestinal diseases and the spread of parasitic eggs. In addition, cases of allergic reactions caused by cockroach body fluids and feces have also been reported.

furthermore, products from factories, goods in shops and food at home can all cause economic losses due to cockroach biting and fouling. Occasionally, there are failures of communication equipment and computers caused by cockroaches, resulting in accidents. Some people abroad call cockroaches "computer pests".

Reference: Baidu Encyclopedia-Cockroaches.