Question

Cockroach of genus Blatta is known as
a. German cockroach
b. Oriental cockroach
c. American cockroach
d. Australian cockroach

Answer 1

Hint: Cockroaches are the insects that belong to Arthropoda and order Blattodea. These are the most primitive living winged insects. These are cold-blooded insects. Cockroaches have different genus on the basis of which they are named. Cockroaches have 50mm length, flat body, and have fast locomotion. The ootheca is the egg case of the cockroach.

Complete answer:
The oriental cockroach is the largest species of cockroach. It is also called a water bug. It lives in damp areas and black beetles because it has a dark body.
There are numerous species of cockroaches but two of them are common in India
- Periplaneta Americans (American cockroach)
- Blatta orientalis (Oriental cockroach)

The oriental cockroach is 25mm long and is darker in color. The female wings are rudimentary and they do not reach the hind end of the male body.

The scientific name of German cockroaches is Blattella germanica. Commonly found in hotels, houses, and restaurants.
The scientific name of Australian and is Periplaneta australasiae. Mostly found outdoors.

Hence, the correct answer is option (B).

Additional information:
- The adult male oriental cockroach is 18-29 mm and the adult female is 20-27 mm in length. Has a glossy body.
- They prefer dark and moist places to live such as life in drains, porches, decaying organic matter, etc.
- Females have reduced forewings as compared to males.

Note: Oriental cockroach belongs to the genus Blatta. The oriental cockroach has slower locomotion than other cockroaches. These are mainly nocturnal. Both males and females are flightless. Cockroaches spread bacteria and viruses to the dishes, utensils, and food from their legs. This causes food poisoning, salmonella, etc. It is more difficult to get rid of oriental cockroaches than any other cockroaches. These cockroaches are not able to climb as they have no pads on their feet.