There are three stages in the Cockroach life cycle: egg, nymph, and adult. Roach eggs develop in a casing called the ootheca. When a female roach is carrying an ootheca she is said to be ‘gravid’. The egg cases are so distinctive in shape and size. One ootheca can contain up to 50 eggs. Some cockroaches glue the ootheca to a hard surface so it can’t be removed until the eggs inside it hatch. German cockroach is unique in that she carries the ootheca for nearly the entire incubation period. Once hatched all roaches develop with gradual metamorphosis. Development from eggs to adults takes 2-4 months.
- The German cockroach’s egg cases are light brown in color and typically measure about 1/3 inch (8–10mm) in length.
- The American cockroach’s ootheca is mahogany brown in color and measures approximately 1/3-inch (8–10mm) in length.
- The brown-banded cockroach’s ootheca is yellowish or reddish-brown in color and averages 1/4-inch in length.
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Posted by Kurt Reitberger on May 8, 2013 at 5:57 pm
I tought that the life cycle for the German Cockroach from egg to adult 12 to 13 Months not 2 to 4 Months THats a Big Differance what gives
And how many month does a adult Cockroach live to ?? :))
Posted by pest011 on May 9, 2013 at 2:16 pm
German cockroach nymphs are wingless and incapable of reproduction. Nymphs molt six to seven times and can develop completely within 100 days under optimal conditions. The adult stage begins with the last successful molting.