What Kills Spider Eggs: How to Stop Spiders from Breeding in Your Home

» Reproduction » What Kills Spider Eggs: How to Stop Spiders from Breeding in Your Home

Are you wondering what kills spider eggs? With spiders being a common household pest, it is important to know how to protect your home and family from them. In this article, you’ll learn what kills spider eggs and the best ways to keep spiders away from your home. You’ll also find out what you should do if you find a spider nest in your home. By the end of this article, you’ll be well-prepared to protect your home from spiders and their eggs.

Types of Spiders

Types Of Spiders

Spiders belong to the Araneae order, which contains more than 45,000 species. Spiders are divided into two groups, the Mygalomorphae and the Araneomorphae. The Mygalomorphae are the primitive spiders, which are usually large and have heavy bodies with long legs. The Araneomorphae are the modern spiders, which are usually smaller and have lighter bodies with shorter legs. Examples of Mygalomorphae spiders include the tarantula, trapdoor spider, and the funnel-web spider. Examples of Araneomorphae spiders include the wolf spider, jumping spider, and the orb-weaver.

Most spiders produce eggs that are laid in a silken egg sac. The egg sac is usually hidden in a safe area, such as a crack or crevice. The female spider guards the egg sac until the eggs hatch. Killing the egg sac is an effective way to eliminate the spider infestation.

Brown Widows

Brown Widows

  • Brown widows are known for their brown and tan coloring.
  • They are part of the Latrodectus genus, which is known to be extremely venomous.
  • The female brown widow is identified by an orange hourglass shape on the underside of its abdomen.
  • Brown widows are known to lay eggs in clusters, usually containing 100 to 400 eggs.
  • The eggs are usually laid in a silken sac, which is usually attached to a stable object, such as a fence or outdoor furniture.
  • The eggs are usually killed by extreme temperatures, insecticides, or direct physical contact.

Black Widows

Black Widows

  • Spraying insecticides like pyrethrin or carbaryl around the area where the spider eggs are located can help in killing them.
  • The use of a vacuum cleaner to suck out the spider eggs is also effective.
  • Applying insecticidal dust in cracks, crevices and other places where the spider eggs can be located can help in getting rid of them.
  • Using a mixture of soap and water to spray on the spider eggs can help in killing them.
  • Setting sticky traps around the area can also help in trapping the spider eggs.

Other Types

Other Types

  • Vacuuming: Vacuuming often helps to remove spider eggs from carpets and furniture.
  • Silica Gel: This substance works to absorb the moisture from the eggs, killing them in the process.
  • Diatomaceous Earth: This powder absorbs the oils and waxes from the egg, rendering it unable to hatch.
  • Steam Cleaning: Steam cleaning helps to penetrate the egg and kill it.
  • Borax: This powder is effective in killing spider eggs.

Biology of Spider Eggs

Biology Of Spider Eggs

Size 0.5 – 1 mm
Shape Round, oval or cylindrical
Color White, yellow, orange or red
Texture Smooth or spiny
Material Silk
Number of Eggs Up to hundreds

Spider eggs are much smaller than those of other arthropods, measuring only 0.5 – 1 mm in diameter. They can be round, oval or cylindrical in shape, and their color can vary from white to yellow, orange or red. The texture of the eggs can be smooth or spiny. Spider eggs are enclosed in silk and can range from a single egg to hundreds.

Reproduction Cycle

Reproduction Cycle

Spider eggs are laid in silken egg sacs that are typically attached to webs, bark, or leaves. The number of eggs in a single sac can range from a few to several hundred, depending on the species. After the eggs hatch, the tiny spiderlings remain in the egg sac for several days before dispersing.

The spiderlings may remain together for several more days, until they find a suitable place to live. They then start to spin webs and feed on small insects. After a few molts, they become adults, and the cycle begins again.

Stage Description
Egg Laying Spider eggs are laid in silken egg sacs, with number of eggs varying by species.
Spiderlings After hatching, the spiderlings remain in the egg sac for several days before dispersing.
Adulthood After a few molts, they become adults, and the cycle begins again.

Egg Laying Habits

Egg Laying Habits

  • Most spiders lay their eggs in a sac or sacs of silk.
  • The sacs are usually hidden in places such as crevices, bark or leaf litter.
  • Spiders may lay hundreds of eggs at one time.
  • The eggs are often guarded by the female until they hatch.
  • The eggs usually hatch within a few days to a few weeks.
  • The newly hatched spiderlings usually disperse within a few days to a few weeks.

Chemical Options for Killing Spider Eggs

Chemical Options For Killing Spider Eggs

  • Diatomaceous Earth: This powder is made from fossilized algae and can easily kill spider eggs by dehydrating them.
  • Insecticide: Insecticides can be used to kill spider eggs, though it must be properly applied to be effective.
  • Pyrethrin: This is a natural insecticide made from chrysanthemums and can be used to kill spider eggs.
  • Essential Oils: Some essential oils, such as tea tree oil, can be used to kill spider eggs.
  • Boric Acid: This chemical can be used to kill spider eggs, but it must be used carefully as it can be toxic to humans.


Insecticides are a form of pesticide which are used to kill or repel insects. When applied, they can be effective in killing spider eggs and larvae, as well as adult spiders. Insecticides come in a variety of formulations such as dusts, aerosols, liquids, and baits. It is important to read the label to determine the most appropriate formulation for the type of spider infestation and the surface where it is to be applied. Dusts and aerosols are often used for treating cracks and crevices, while liquids and baits are used for treating larger areas. Insecticides can be hazardous to humans or pets if not used correctly, so it is important to follow label instructions carefully.

Natural Repellents

Natural Repellents
Natural repellents are a great way to get rid of spider eggs without using harsh chemicals. Some of the most effective natural repellents are garlic, peppermint, and citrus oil. Garlic can be crushed and spread around the house to repel spiders. Peppermint can be brewed into a strong tea and sprayed around the house to keep spiders away. Citrus oil can be mixed with water and sprayed in areas where spiders are commonly found. Another natural repellent is diatomaceous earth, which can be spread around the house to act as an abrasive material that kills spider eggs and other insects.

Non-Chemical Options for Killing Spider Eggs

Non-Chemical Options For Killing Spider Eggs

Physical removal is an effective way to get rid of spider eggs. Using a vacuum cleaner is a quick and easy way to suck up spider egg sacks. Be sure to dispose of the bag or container away from the house so the eggs don’t hatch. Using a broom or dustpan to sweep up the eggs is another non-chemical option.

Insecticides that contain pyrethrins or pyrethroids can also be used to kill spider eggs. Although these are chemical treatments, they are usually derived from natural sources and are less toxic than synthetic chemical pesticides.

An even less toxic option is to use a damp cloth to wipe away the spider eggs. This method is particularly effective for egg sacs that have been attached to walls, ceilings, or other surfaces.

A final option is to use a natural insect repellent. Many natural products, such as essential oils, garlic, and diatomaceous earth, are known to be effective at keeping spiders away. This will not kill the eggs, but it will help prevent spiders from laying eggs in the first place.

Physical Removal

Physical Removal
The most effective physical method of removing spider eggs is with a vacuum cleaner. It is important to vacuum around the areas where spiders may be nesting, such as window frames and door frames, as well as any cracks or crevices in the walls. Vacuuming regularly can help to reduce the number of eggs that are laid. Additionally, it is important to dispose of the vacuum bag after each use, since spider eggs can survive in the bag for some time.

In addition to vacuuming, physical removal can also be done by scraping off the spider eggs with a putty knife or other flat object. This is most effective when done on flat surfaces, such as walls and ceilings. When scraping off the eggs, it is important to be careful not to spread them around.

Finally, physical removal can be done by picking up the egg sacs with a pair of tweezers or a pair of gloves. This is most effective when done outdoors, such as in the garden or on the patio, as spider eggs can easily be spread indoors. It is important to dispose of the egg sacs as soon as possible to prevent them from hatching.


Vacuuming is an effective way to get rid of spider eggs. Spiders often lay their eggs in small crevices around the house where they can be hard to reach. Vacuuming these areas will create suction, pulling away the spider eggs and sucking them up into the vacuum cleaner. It is important to empty the vacuum cleaner afterwards and dispose of the contents in an outside bin.


Trapping is an effective method for killing spider eggs. It involves setting up traps to capture spiders and their eggs. Trapping can be done with baits, lures, and physical traps such as sticky traps, glue boards, and funnel traps. Baits and lures are used to attract spiders, while physical traps are used to capture them. When using baits, it is important to use the right bait that is attractive to the species of spider being targeted. Physical traps should be placed in areas where spiders are likely to travel, such as along walls, under furniture, and in corners. Inspecting the traps regularly and disposing of the trapped spiders and eggs is important in order to effectively kill spider eggs.

Additional Prevention Methods

Additional Prevention Methods

Method Details
Seal cracks & crevices Seal cracks and crevices in walls and floors, around windows, and around the foundation of the house to prevent spiders from entering.
Vacuum regularly Vacuum regularly to eliminate spiders and their eggs.
Remove hiding spots Remove clutter, wood piles, and other hiding spots spiders may use to nest.
Insecticides Spray insecticides along windowsills, door frames, and baseboards to kill spiders and their eggs.



  • Vacuum floors, furniture, and other surfaces to remove spiders, webs and egg sacs.
  • Wash bedding and other fabric items with hot water and detergent.
  • Clean and seal cracks and crevices in walls, floors, and ceilings.
  • Dust and mop floors and wipe down furniture.
  • Wash windows and screens.
  • Store items off the floor.

Sealing Cracks and Crevices

Sealing Cracks And Crevices

  • Inspect the entire house for cracks and crevices.
  • Fill all cracks and crevices with a caulking gun.
  • Look for cracks and crevices around windows, doors, pipes, and other points of entry.
  • Seal any gaps and cracks in the foundation.
  • Repair any damaged window or door frames.
  • Ensure all screens are properly installed.
  • Check around vents, pipes, and other points of entry.
  • Replace any damaged or missing weatherstripping.

Eliminating Food Sources

Eliminating Food Sources
Spiders need food to survive and reproduce, so eliminating food sources is an effective way to get rid of spider eggs. Clean up any food crumbs, cobwebs, and other debris that can attract spiders. Vacuum regularly and clean up any spills or messes quickly. Also, keep food in sealed containers, and wipe up any food residue from counters and other surfaces. Additionally, seal any cracks or crevices in your home where spiders can enter and hide.

Pros and Cons of Killing Spider Eggs

Pros Cons
Reduces the number of spiders in the area, preventing them from becoming a nuisance. Killing spider eggs could disrupt the balance of the local ecosystem.
Can be done quickly and effectively, reducing the amount of time spent dealing with spiders. Can be difficult to find and identify spider eggs, as they are often hidden in small crevices.
Eggs can be killed in a variety of ways, depending on the individual situation. Can be dangerous if not done properly, as spider eggs contain venomous materials.

Killing spider eggs can be a viable solution for reducing the number of spiders in an area. However, it is important to weigh the pros and cons of doing so in order to determine if it is an appropriate solution for a particular situation.


Spider eggs can be killed by applying insecticides, vacuuming, using essential oils, or by using a DIY spider egg spray. The best method for killing spider eggs depends on the environment, the severity of the infestation, and the type of spider eggs present. While insecticides are generally effective, they can be toxic to humans and pets if not used properly. Vacuuming and using essential oils are safe and effective alternatives for killing spider eggs. DIY sprays are also a safe and effective option for killing spider eggs.

Frequently Asked Questions

What is a Brown Widow Spider and How Do I Identify It?

A brown widow spider (Latrodectus geometricus) is a species of spider found mainly in warm climates. It is typically brown and gray in color, with a distinct orange or yellow hourglass marking on its abdomen. They also have a distinctive spiky egg sac, which is usually white with brown or yellow markings. Brown widow spiders are typically found in dark, secluded areas, such as woodpiles, sheds, and under eaves and ledges. They are not aggressive, but their venom can be dangerous if you are bitten.

How can I prevent a spider egg sac from forming in my home?

To prevent spiders from laying eggs in your home, regularly clean your home to remove spider webs and egg sacs. Vacuum and dust regularly, particularly in corners, closets, and other areas where spiders may be hiding. Seal cracks and crevices around windows, doors, vents, and other openings to prevent spiders from entering your home. Consider using eco-friendly insecticides to deter spiders if necessary.

How Do I Safely and Effectively Destroy Spider Eggs?

To safely and effectively destroy spider eggs, use a vacuum cleaner to suck them up, or use a damp cloth or paper towel to wipe them away. To prevent more eggs from being laid, use an insecticide to kill the spiders and their eggs. Make sure to read the instructions carefully before using any insecticide. If possible, try to prevent spiders from entering the home by sealing off entry points, such as cracks and gaps around windows and doors.

What is the Best Way to Get Rid of a Spider Egg Sac in My House?

The best way to get rid of a spider egg sac in the house is to vacuum them up. Vacuuming the egg sacs will not only remove the eggs but also any adult spiders that may be present. After vacuuming, dispose of the vacuum bag in an outside trash can. If the egg sacs cannot be vacuumed, use a broom and dustpan to remove them from the house. Be sure to close off any rooms where the eggs have been found to prevent any spiders from entering.

What other measures can I take to protect my home from spiders?

To keep spiders and their eggs out of the home, it is important to reduce the amount of moisture and humidity by using dehumidifiers, sealing cracks and crevices, and fixing any leaks in plumbing or ventilation systems. Regularly inspecting the property for spider webs, egg sacs, and spiders is also important. Vacuuming regularly, particularly in dark, rarely used corners of the home, can help reduce the number of spiders and their eggs. Additionally, sealing any openings to the outside, such as gaps around windows, doors, and vents, can help prevent spiders from entering the home. Lastly, using natural spider repellents, such as essential oils, may help to deter spiders from entering the home.


Physical removal and cleaning are the best ways to rid your home of spider eggs and hatchlings. Vacuuming regularly and using a pesticide spray with residual effects can help keep your home free of spiders. Additionally, sealing any cracks and crevices in your walls, windows, and doors can prevent spiders from entering your home in the first place.

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