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Often, people think of cockroaches and are instantly terrified. We grow up fearing these tiny little pests that truthfully do minimal harm to humans. Sure, they are gross and dirty and can leave bacteria on surfaces potentially leading to illness and disease, but for the most part, cockroaches are nothing but a pest. If left untreated, one cockroach can lead to hundreds. So let’s take a look at how cockroaches start out and what you should do if you find cockroach eggs in your house.
Cockroaches develop in three stages: egg, nymph and adult. Each cockroach species has their own physiological and biological way of reproducing, which means each species' eggs look different. Cockroaches produce an egg sac, called an ootheca, which holds multiple eggs. The ootheca is encased with a protein substance that will harden into a sturdy, protective casing.
It’s important to know that if you find cockroach eggs or an egg casing in your home, you should contact us immediately. Finding these eggs typically means you have an infestation. Depending on the species, a single female cockroach can produce anywhere from 13 to 40 eggs in each egg case, and that’s an infestation you definitely don’t want to have to deal with on your own.
American cockroaches are widely distributed around the world and mainly live in tropical and subtropical areas. Female American cockroaches only need to mate once to produce multiple ootheca because females can store sperm. Their egg capsules are roughly 38 mm long and are dark reddish or blackish, brown in color. Each ootheca holds about 16 eggs. Females glue their ootheca to hard surfaces such as cupboards, cardboard and other materials. The ootheca often blends in with these surfaces which can make eggs hard to find and remove. At ideal room temperature, female American cockroach eggs will hatch into nymphs within approximately 56 days.
Brown-banded cockroaches gravitate toward warmer areas, typically 80℉+. Female brownbanded cockroaches carry matured ootheca cases for 24 to 36 hours and tend to place egg cases close to one another. Their egg casings are small, measuring at about 5 mm in length and are tan in color. Brown-banded cockroaches typically place their ootheca on coarse surfaces. These eggs develop best in warm temperatures and one egg case contains about 13 eggs.
The German cockroach is the most common cockroach found throughout the United States. German cockroach egg casings are brown and in a capsule-like shape. They are roughly 8 mm long and will hatch in about 30 days in the ideal room temperature. This common roach species has a higher reproduction rate compared to other roach species. A single female German cockroach can produce anywhere from 30 - 40 eggs per case. German cockroach eggs develop faster from embryo to the next adult stage compared to those of other species.
Oriental cockroach eggs have been found to tolerate lower temperatures than other species of cockroaches. Their egg casings look dark brown or even reddish and are 8 to 10 mm long. A female Oriental cockroach may lay 1 to 18 egg cases per lifetime. Eggs are typically deposited near food or water. The embryos will develop in about 43 days in optimal temperatures, but in cooler temperatures, this time period could double.
The best way to get rid of cockroaches is to partner with a professional pest control service like Western Exterminator. Call 800-937-8398 or contact us online to remove existing infestations and prevent them in the future.
Find a Western Exterminator near you