Classification of cockroaches:
1, Blattella germanica: It is a common indoor pest. Light brown with two black stripes on the chest, the female lays eggs 3 days after mating and carries them for about 20 days. Small in size, about 12 mm (less than 0.5 inch) long, so it is often taken home by grocery bags or boxes. Shipped to all parts of the world. It can produce three or more generations a year. German cockroaches are abundant around the water pipes of croton aqueduct in new york, so they are commonly known as croton bugs.
2. Periplaneta americana: It is 30 ~ 50 mm long (up to 2 inches long), light reddish brown, and lives outdoors or in a dark and warm indoor environment (such as basement and room with stove). The adult period is about 1.5 years. Female worms can lay 50 or more eggs, and each pod contains about 16 eggs. After 45 days, the nymphs hatch. The nymph stage is 1 1 ~ 14 months. American cockroaches are native to tropical America and subtropical America. They have well-developed wings and can fly long distances.
3. Brown-banded cockroaches: similar to German cockroaches, but slightly smaller. The wings of the male body are well developed, the body color is slightly lighter than that of the female body, and the wings of the female body are short and have no function. There are two light stripes on the back of both sexes, and the life span of adults is 200 days. There can be two generations every year. Eggs can be laid in clothes, planks or cracks in the floor. With the emergence of houses with heating equipment, brown-banded cockroaches also appear in cooler areas.
4. Oriental cockroaches: Oriental cockroaches are considered to be the dirtiest domestic pests. The body is oval, black or dark brown, shiny and 25 ~ 30 mm long. Life history is similar to that of American cockroaches. The male wings are short and developed, and the female wings are degraded. Originated in Asia and distributed to all temperate regions with merchants' vehicles.
Extended data
Danger prevention
1. In addition, cockroaches can also be artificially infected with bacteria that cause cholera, pneumonia, diphtheria, gangrene, anthrax and tuberculosis in Asia.
2. Cockroaches can carry many kinds of eggs, such as roundworms, hookworms, beef tapeworms, roundworms and whipworms. They can also be used as intermediate hosts for Echinococcus moniliforme, Hymenolepis brevis, tumor ducts and other nematodes.
3. Cockroaches can also carry many kinds of protozoa, among which four kinds of protozoa are pathogenic to humans or animals, such as amebic dysentery and Giardia.
4. Experimental studies have confirmed that cockroaches can carry, preserve and excrete viruses, including Coxsackie virus and poliovirus.
5. cockroaches can also carry fungi. A variety of fungi, including a large number of Aspergillus flavus, were isolated from cockroaches captured indoors in Nanjing and Nantong, Jiangsu Province.
In order to eliminate cockroaches, you must do the following work:
1, clean up garbage and unused items, especially books, newspapers and magazines at home;
2, check the furniture below and behind, as well as false smallpox, air trough and wire trough and other hidden places;
3. Fill the cracks and gaps on the ceiling, wall and floor with non-thermal insulation materials to achieve the best sealing effect.
4. All cockroach remains and egg sheaths must be crushed and removed to prevent the egg sheaths from hatching and continuing to cause trouble. (1: For the egg sheath, it must be burned. 2: Rush into the sewer. )
5, furniture should try to avoid using plywood or ceiling wall, but should choose aluminum, stainless steel, plastic and other materials of furniture, this kind of furniture is easy to wash, no insulation effect, cockroaches are not easy to survive. It is best to keep furniture away from the wall, so it is not easy to hide cockroaches.
According to the habits of cockroaches, you must cut off their food sources.
1. Keep the residence dry and clean: delimit a strict eating area, and no eating is allowed except the restaurant and kitchen. Pay attention to the cleanliness of the kitchen and bathroom, and no water is allowed.
2. Store food correctly and thoroughly clean up food residues after feeding pets. (For cats at home, dog friends must pay attention)
3. The trash can should be completely emptied at least once a day. Tie the mouth of the garbage bag tightly before putting it.
4. Don't eat in bed.
5. Prevent cockroaches from coming in.
References:
Baidu encyclopedia-cockroach