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How Long Can German Roaches Live Without Food?

How Long Can German Roaches Live Without Food?

German roaches are a common pest in many households. These pests can cause major disruption to our lives and homes, making them difficult to get rid of.

When trying to control an infestation, one important factor is understanding how long German roaches can live without food.

This article will discuss the survival of German roaches when deprived of food and provide tips on preventing and managing infestations in your home.


Studies show that German roaches can live for a month without food. This is due to their ability to slow down their metabolism and conserve energy.

They also have high-fat reserves, which helps them last longer than other species with no excess food.

The exact amount of time German roaches can last without food or water depends on environmental factors such as temperature and humidity levels and the size and age of the roach itself.

In addition, these insects can also go up to three months without water if necessary.

This next article will discuss different aspects of German roaches and how long they last without food. Then there will be a summary followed by frequently asked questions about German roaches.

Life Cycle of German Roach

Life Cycle Of German Roach

To understand how long German roaches can survive without food, it’s important first to understand their life cycle.

German roaches are one of the most familiar in homes and other sites. German roaches, like other insects, have four stages of development:

  • Egg
  • Nymph
  • Adult
  • Reproductive Adult

The eggs are laid in small capsules holding up to 50 eggs simultaneously. After hatching, the nymphs go through several molts before reaching adulthood.

The average lifespan of a German roach is around 100 days depending on environmental conditions such as temperature and availability of food sources.

Short Life Span

Short Life Span

German roaches have one of the shortest lifespans out of all insect species, so two weeks without food can make a great difference in these pests’ lives.

German roaches can survive for up to two weeks to one month without food sources.

However, after two weeks of starvation, their metabolism will slow considerably. This means they will move more slowly and become less active than usual.

Additionally, German roaches need access to water or humidity, so areas like bathrooms are popular spots for them.

Female German Roach vs. Male German Roach

Female German Roach Vs. Male German Roach

Females are even stronger than males, as with many species.

A recent study has found that adult female German cockroaches can survive without food and water for up to 13 days, while male German cockroaches can only survive for about a week without sustenance.

Scientists confirmed this statement after conducting several experiments on the insect’s biology and behavior.

The experiment results showed how long the roaches could live without food and water in a controlled environment.

In addition, the researchers noted that during the experiment, females showed significantly fewer signs of mortality than their male counterparts when deprived of food and water.

Males displayed visible weakness when they went over seven days without sustenance. At the same time, females showed no changes in their activity levels throughout the 13 days without food and drink.

No Food Source, Will German Roaches Leave?

No Food Source, Will German Roaches Leave?

The answer is yes and no. If a food source runs out, some species of cockroach may leave their current location and find another food source. However, German cockroaches, one of the most common types, will stay put even if there’s no food available.

These roaches can last up to two months without any sustenance and can survive extreme temperatures for days or even weeks.

In rare cases, if a home has no accessible food source, German roaches will eventually leave in search of one. However, This does not mean that the infestation is gone for good; It just means it has been temporarily reduced.

Understanding how long these roaches can survive without food is important for pest control measures. Understanding their behavior makes it possible to take steps to help eliminate them from homes and businesses.

How To Keep Roaches Away From Food?

How To Keep Roaches Away From Food?

It is essential to take preventative actions to keep German roaches away from food.

These pests are incredibly resilient and can live without food for up to a month. Therefore, people must regularly check their kitchen and pantry for signs of German roaches to reduce the risk of infestation.

The first step in preventing a German cockroach infestation is keeping areas clean and free from food debris. Cleaning all surfaces with soap and water will help control the spread of these pests.

Additionally, sealing any cracks or crevices in walls or floors can help prevent them from gaining access to food sources.

It is also essential to store all food items in airtight containers that the roaches cannot breach, as they can squeeze through tiny openings in search of sustenance.

In addition, regular cleaning and vacuuming should be done to eliminate roach eggs or larvae that adult roaches may have left behind.


German roaches can survive without food, but the exact time is still being determined.

However, they will likely die in two weeks or less if they are deprived of food and water.

We also know that their lifespan depends on other factors, such as temperature and availability of water.

Ultimately, it’s important to keep your home clean and free from any potential food or water sources for German roaches to prevent them from taking up residence.

If an infestation occurs, professional extermination may be necessary to eradicate them from home completely.

Frequently Asked Questions

How Long Can a German Roach Live Without Air?

This depends on the type of German roach. However, a German roach can live without air from 40 minutes to two weeks, depending on the species type. And can even survive being submerged underwater for half an hour.

What Temperature Kills German Roaches?

Temperatures above 113 degrees Fahrenheit (or 45 degrees Celsius) can succumb to German roaches.

Anything lower than this will not kill the pest but instead may cause them to enter a state of hibernation and become dormant until conditions improve.

What Food Attracts German Roaches?

Food sources in the kitchen are a primary attraction for German roaches. Starchy foods like bread, pasta, cereal, and dried fruits draw these pests in, as do sugary items such as cookies, cake, and candy.

Grease or fats on countertops or floors also act as an attractant for roaches.

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