What is a Cockroach?
The word cockroach is rooted in the Spanish cucaracha. The cockroach is recognizable by a flattened oval body, long threadlike antennae, and a glossy black or brown leathery integument. The head is held downward, and the mouthparts are directed to the rear instead of forward or downward as is the case of the majority of other insects. The male often has two pairs of wings, whereas the female, who in some species, is wingless or has vestigial wings. The female creates eggs in egg cases (known as oothecae). These are on occasion held protruding from her body or could be glued in protected parts. After the female deposits an egg case, the soft, white nymphs emerge. As their exoskeleton hardens, it turns brown in hue. The shape and large size (some species possess a wingspread measurement of upwards of 12 cm [4.7 inches]) of cockroaches have turned them into objects of objective in the biological laboratory.
The cockroach enjoys a warm, humid, dark environment and is often found living in tropical or other mild temperatures. Just a small number species have become pests. The insect damages more material than it consumes and possesses a yucky scent. The food preference of the roach, which can be both plant and animal product, ranges from food, paper, clothing, and books to dead insects, especially bedbugs. Insecticides should be preferred in roach removing.
The American cockroach (species Periplaneta americana) is 30 to 50 mm long (up to about 2 inches), reddish brown, and lives out of doors or in dark, heated indoor locations (e.g., basements and furnace rooms). In its adult life, a period of about 1.5 years, the female drops 50 or more oothecae, each possessing around 16 eggs that hatch after 45 days. Nymphal life takes from 11 to 14 months. The American cockroach, a native of tropical and subtropical America, has well-developed wings. However, most species are often not good flyers.
The German cockroach (Blattella germanica), a common pest in houses and occasionally erroneously thought of as a waterbug, is light brown with two dark stripes on the prothoracic region. The female produces the ootheca three days from mating and carries it for generally around 20 days. Because it is small (about 12 mm [less than 0.5 inch] long), this cockroach frequently is taken into households in grocery bags and boxes; it has been spread between nations by boat. Three or more generations could occur yearly. This cockroach, abundant in the water pipes of the Croton Aqueduct in New York City, has become called the Croton bug.
The brown-banded cockroach (Supella supellectilium) resembles the German cockroach but is even smaller. The male has completely developed wings and is lighter in colour than the female, whose wings are stunted and nonfunctional. Both sexes have two light-coloured bands across the back. The adult life span is generally about 200 days, and there might be two generations a year. Eggs might be dropped in clothes, wood molding, or cracks in the floor. With the invention of heated buildings this cockroach became common in cooler temperatures.
The Oriental cockroach (Blatta orientalis) is thought to be one of the dirtiest of household pests. It is oval, shiny black or dark brown, 25 to 30 mm (1 to 1.2 inches) long, with a life cycle similar to that of the American cockroach. The male has short, fully developed wings, while the female possesses vestigial wings. This cockroach has been carried by vehicles of business from its Asiatic origins to almost every temperate regions.
Wood roaches are not domestic pests. Parcoblatta pennsylvanica, the common wood cockroach, lives in logs and stones in northern latitudes. The male and female are so different in appearance that they were once believed to be different species. The male, 15 to 25 mm (0.6 to 1 inch) long, has wings that go past the abdomen; the female is smaller and possesses much shorter wings. Cryptocercus punctulatus eats wood with the aid of select protozoans in its digestive tract.
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