![]() ![]() Once nymphs emerge from the egg sack, they are on their own. ![]() They typically produce a new capsule every six weeks, and it takes the eggs about 28 days to hatch. German cockroaches are capable of producing four to eight egg capsules during adulthood. This allows for a greater survival rate of nymphs. Unlike the female American cockroach, German cockroaches carry the capsule until about 24 hours before the eggs are ready to hatch. This capsule contains 40 eggs, give or take a few. EggĪfter mating, females produce an egg capsule that is approximately one-fourth of an inch long. Like their larger counterparts, they also have three life stages. While German cockroaches are smaller than American cockroaches, they can be more difficult to control because they reach sexual maturity sooner and lay larger clutches of eggs. Adult females live longer and can survive up to 786 days, while adult males can live up to 362 days. On average, the lifespan of the American cockroach from egg to adulthood is 168 to 786 days. Once the nymphs have matured, they become adults who mate and lay new egg sacks. This stage between a molting period is known as an “ instar,” and the number of instars varies in American cockroaches. During maturation, they will molt several times, causing them to change from a light grayish brown to the reddish-brown color you’re familiar with. From there, it takes them about 6 to 12 months to mature into adults. NymphĪfter the nymphs hatch from their individual eggs, they join forces and break through the egg capsule using a synchronized effort. The overall timing of hatching does depend on environmental factors, such as temperature and humidity. After four to eight weeks, nymphs will hatch from the eggs. Each case holds about 16 eggs, and the female can drop the egg capsule within one day of it being formed. Additionally, the female can store sperm, meaning she only needs to mate once to lay multiple egg cases.įemales will lay anywhere from 6 to 14 egg capsules in their lifetime. Female American cockroaches are capable of producing one capsule a week after mating, although they can produce two in one week. EggĪmerican cockroach eggs are laid in dark brown capsules that are about five-sixteenths of an inch long. Of the two cockroaches that most commonly infest households in the U.S., the American cockroach is larger and is capable of gliding. Learn about cockroach reproduction to get a better idea of why an infestation can be so taxing to deal with. Understanding the lifecycle of American and German cockroaches (both common in the United States), including how they reproduce (and how rapidly), can give you more insight into why they’re so hard to control.
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