What kinds of cockroaches are there?

1, Periplaneta americana. It is 30 ~ 50 mm long, reddish brown, and lives outdoors or in a dark and warm indoor environment (such as a basement or a room with a stove). The adult period is about 1.5 years. 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.

2. German cockroaches. It is a common indoor pest. 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.

3, brown belt cockroaches. Like a German cockroach, but 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 cockroach. It is considered as the dirtiest domestic pest. 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:

Hazards of cockroaches:

1, endangering health

Cockroaches have the bad habit of spitting and excreting while eating, and will secrete smelly liquid. In their activities, they can not only carry more than 40 pathogens, such as Leprosy, Yersinia pestis and Shigella dysenteriae, but also are important vectors of intestinal diseases and parasitic diseases, and their secretions and feces contain a variety of carcinogens.

Hiding in dark corners, such as gaps in kitchens and bathrooms, is not only harmful to grain, oil, food, clothing and books, but also infects people with diseases.

2. Damage to property

Cockroaches eat everything, and the food at home will be polluted by cockroaches, causing economic losses. In addition, cockroaches can easily enter electrical appliances, computers and other household appliances and bite wires or cause short circuits, leading to unexpected failures.

Now more and more families, especially kitchen appliances, are related to cockroaches, such as microwave ovens and induction cookers, which have caused taboo losses to families to some extent.

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