What is a Cockroach?
The word cockroach is taken from the Spanish cucaracha. The cockroach is recognizable by a flattened oval body, long threadlike antennae, and a shining black or brown leathery integument. The head is bent downward, and the mouthparts are aimed backward instead of forward or downward as is the case with many other insects. The male generally has two pairs of wings, while the female, who in some species, is wingless or possesses vestigial wings. The female generates eggs in egg cases (known as oothecae). These are at times held coming out from her body or might be stuck in protected places. After the female produces an egg case, the soft, white nymphs emerge. As their exoskeleton solidifies, it turns brown in colour. The form and remarkable size (particular species possess a wing span measurement of higher than 12 cm [4.7 inches]) of cockroaches have made them objects of area in the biological laboratory.
The cockroach enjoys a warm, humid, dark living environment and is often found in tropical or other mild areas. Only a few species have become pests. The insect damages more material than it eats and possesses a unpleasant smell. The food preference of the roach, which is both plant and animal products, can be from food, paper, clothing, and books to dead insects, especially bedbugs. Insecticides are taken in roach killing.
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). During adult life, lasting about 1.5 years, the female generates 50 or more oothecae, each possessing usually 16 eggs that hatch after 45 days. Nymphal life takes from 11 to 14 months. The American cockroach, indigenous to tropical and subtropical America, has well-developed wings. However, the majority of species are not good flyers.
The German cockroach (Blattella germanica), a common household pest and is sometimes erroneously called a waterbug, is light brown with two dark stripes on the prothoracic area. The female produces the ootheca three days post mating and carries it for generally about 20 days. Because it is tiny (about 12 mm [less than 0.5 inch] long), this cockroach generally is taken into residences in grocery bags and boxes; it has been taken across the world by boat. Three or more generations might live yearly. This cockroach, found in abundance throughout the water pipes of the Croton Aqueduct in New York City, is labeled the Croton bug.
The brown-banded cockroach (Supella supellectilium) closely resembles the German cockroach but is a little bit smaller. The male has wholly developed wings and is brighter in shade than the female, whose wings are short and nonfunctional. Both sexes have two light-coloured bands across the back. The adult life span is roughly 200 days, and there might be two generations in a year. Eggs can be deposited in clothes, wood molding, or cracks in the floor. With the introduction of heated buildings this cockroach became common in cooler locations.
The Oriental cockroach (Blatta orientalis) is held as one of the filthiest 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 in vehicles of business from its Asiatic origins to almost all the temperate regions.
Wood roaches are wild pests. Parcoblatta pennsylvanica, the common wood cockroach, habits below logs and stones in northern latitudes. The male and female are so differing in appearance that they were initially seen as unique species. The male, 15 to 25 mm (0.6 to 1 inch) long, has wings that extend beyond the abdomen; the female is smaller and has much shorter wings. Cryptocercus punctulatus digests wood with the help of select protozoans in its digestive tract.
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