What is the difference between male and female roaches

Yaman May 04, Anal Styles in males. Upvote 4. Shalini replied May 04, Yazhini Muthu replied May 04, Msb Srinivas Jun 24, Akshay Hosamani May 10, Male have hind wing so larger and cover abdomen but female doesn't. Upvote 2. Baby Ghosh May 10, The body of female cockroache is relatively larger than the Male cockroach.

The abdomen of Male cockroach is slender and the segment of the abdomen is pointed The wings of female cockroach are smaller than that of the males and extend up to the tip of thr abdomen. Jaga Priyan Jun 24, Maran Kumar May 10, Sexualdimorphism in male cockroach anal style is present. Sumiya Fatima Jun 24, Anal style. Deena Rohith May 03, Anal cerci.

This discussion on What s the main difference between male and female cockroach? The Questions and Answers of What s the main difference between male and female cockroach? If the answer is not available please wait for a while and a community member will probably answer this soon. Upgrade to Infinity. By continuing, I agree that I am at least 13 years old and have read and agree to the terms of service and privacy policy.

The Best you need at One Place. Start Your Infinity Experience. Forgot Password. Enter OTP. Himanshuraj Saini. Lakshya Sangtani. Msb Srinivas. Akshay Hosamani. Baby Ghosh. Jaga Priyan. Maran Kumar. It occurs in buildings throughout Florida, especially in commercial buildings. In the northern United States the cockroach is mainly found in steam heat tunnels or large institutional buildings. The American cockroach is second only to the German cockroach in abundance. Figure 1. Ootheca and first, second, third and fourth instar nymphs of the American cockroach, Periplaneta americana Linnaeus.

Photograph by Paul M. Choate, University of Florida. Forty-seven species are included in the genus Periplaneta , none of which are endemic to the U. Bell and Adiyodi The American cockroach, Periplaneta americana , was introduced to the United States from Africa as early as Bell and Adiyodi The American cockroach has spread throughout the world by commerce. It is found mainly in basements, sewers, steam tunnels, and drainage systems Rust et.

This cockroach is readily found in commercial and large buildings such as restaurants, grocery stores, bakeries, and anywhere food is prepared and stored. The American cockroach is rarely found in houses, however infestations can occur after heavy rain. They can develop to enormous numbers, greater than 5, sometimes being found in individual sewer manholes Rust et.

Outdoors, American cockroaches are found in moist shady areas such as hollow trees, wood piles, and mulch. They are occasionally found under roof shingles and in attics. The cockroaches dwell outside, but will wander indoors to search for food and water or to avoid extreme weather conditions. In Florida, areas such as trees, woodpiles, garbage facilities, and accumulations of organic debris around homes provide adequate food, water, and harborages for peridomestic cockroaches such as the American cockroach Hagenbuch et al.

Mass migrations of the American cockroaches are common Ebeling They migrate into houses and apartments from sewers via the plumbing, and from trees and shrubs located alongside buildings or with branches overhanging roofs. During the day the American cockroach, which responds negatively to light, rests in harborages close to water pipes, sinks, baths, and toilets where the microclimate is suitable for survival Bell and Adiyodi Eggs: Females of the American cockroach lay their eggs in a hardened, purse-shaped egg case called an ootheca.

About one week after mating the female produces an ootheca and at the peak of her reproductive period, she may form two oothecae per week Bell and Adiyodi The females on average produce one egg case a month for ten months, laying 16 eggs per egg case. The female deposits the ootheca near a source of food, sometimes gluing it to a surface with a secretion from her mouth. The deposited ootheca contains water sufficient for the eggs to develop without receiving additional water from the substrate Bell and Adiyodi The egg case is brown when deposited and turns black in a day or two.

It is about 8 mm long and 5 mm high. Nymph: The nymphal stage begins when the egg hatches and ends with the emergence of the adult. The number of times an American cockroach molts varies from six to 14 Bell and Adiyodi The first instar American cockroach is white immediately after hatching then becomes a grayish brown.

After molting, subsequent instars of the cockroach nymphs are white and then turn reddish-brown, with the posterior margins of the thoracic and abdominal segments being a darker color. Wings are not present in the nymphal stages and wing pads become noticeable in the third or fourth instar. Complete development from egg to adult is about days.

The nymphs as well as the adults actively forage for food and water. Figure 2. Fifth, sixth and seventh instar nymphs of the American cockroach, Periplaneta americana Linnaeus. Adult: The adult American cockroach is reddish brown with a pale brown or yellow band around the edge of the pronotum.

The males are longer than the females because their wings extend 4 to 8 mm beyond the tip of the abdomen. Males and females have a pair of slender, jointed cerci at the tip of the abdomen. The male American cockroaches have a pair of styli between the cerci while the females do not. Figure 3. Adult male American cockroach, Periplaneta americana Linnaeus. Photograph by P. Koehler , University of Florida. Figure 4. Adult female American cockroach, Periplaneta americana Linnaeus.

Figure 5. Adult male American cockroach, Periplaneta americana Linnaeus , cerci and stylets ventral view. The American cockroach has three life stages: the egg, a variable number of nymphal instars, and the adult. The life cycle from egg to adult averages about days and the adult life span may be another days.

The nymphs emerge from the egg case after about six to eight weeks and mature in about six to twelve months. Adults can live up to one year and an adult female will produce an average of young in her lifetime. Environmental factors such as temperature and humidity affect the developmental time of the American cockroach. Outdoors, the female shows a preference for moist, concealed oviposition sites Bell and Adiyodi Figure 6.