Wasps may be found all over the world. They can develop nests around your home, placing you, your family, or your pets in danger of being stung severely. Among these wasps, the black wasp is one of the most common.
How to get rid of a black wasp and prevent it from coming back? To get rid of black wasps, you must first protect yourself and locate their nests. Afterward, you can eliminate their food source. Traps, non-insecticide spray, essential oils, and insecticides can also be used. You can also cover holes and cracks, which is ideal for eliminating black wasp nests.
If you have black wasps in your garden, you are not alone. Believe it or not, these troublesome pests are common in most parts of the US. Nevertheless, they are known to be more prevalent in warmer regions.
So, if you want to know how to get rid of a black wasp, this article is for you. Aside from that, you will also learn more about their nature, such as their appearance, habitat, and life cycle.
What Exactly Is a Black Wasp?
Black wasps are scientifically known as the Sphex Pensylvanicus. They are a part of Sphecidae, a cosmopolitan family of thread-waisted wasps. These digger wasps are also known as Great Black Wasps.
Female black wasps build their nests underground. You may also see them mostly in flower gardens or open areas with flower plants from July to September.
Aside from blooming flowers, the black wasp is also attracted to insects such as grasshoppers, katydids, and crickets. The female black wasp attacks these insects and stings them. Afterward, they bring the dead insects to their underground nest and reserve them as food for their young. They love soft and dry soil for their shelter.
A male black wasp worker can live between 12 and 22 days, while a queen wasp can live up to one year. On average, a black wasp may weigh between 30 and 59 milligrams and flies at speeds ranging from 7 to 30 miles per hour.
These digger wasps communicate by smelling, and they emit a chemical called pheromones to attract a mate or signal that there is food around.
Related: What Do Wasps Eat? | Information & Facts
What Does a Black Wasp Looks Like?
It’s quite easy to see if there is a black wasp in your area.
- They can grow between 1 and 1.5 inches long. Females are usually bigger than males.
- The color of their body is satiny matte black, and they have a narrow constriction between their abdomen and thorax, which is the middle segment of the body that holds the head, wings, and legs.
- A black wasp has large eyes, a large head, and shiny wings that are usually folded together lengthwise down at its back.
- Their body has no stripes or markings. Their legs are spiny and long.
- In most cases, their huge sickle-shaped mandibles (mouthparts) are held together but overlapping and features an extra spike.
What Is the Life Cycle of a Black Wasp?
Just like other wasps, the black wasp undergoes a complete metamorphosis from egg, larva, and pupa until it becomes an adult. However, they are solitary wasps which means they don’t live in colonies. Instead, a female will mate with a male and will then dig a hole in the ground. She will then sting another insect, such as a grasshopper, for food.
The female black wasp will drag the dead insect to the hole and lay a single egg on it. She will usually repeat the process in another hole until she has laid a large number of eggs.
Once the larvae are hatched, they will eat the grasshoppers and will soon emerge as adults. They will eventually learn to eat nectar and pollen from various flowers.
Does Black Wasp Have Benefits to the Environment?
While many people consider black wasps to be pests, these small insects offer environmental advantages. They are great pollinators because they move or transfer pollen from the stamen (male part of the flower) to the stigma (female part of the flower) or another flower. This is essential in helping the plant become fertilized.
Aside from that, the black wasp also helps eliminate garden pests such as cicadas, grasshoppers, and katydid. The female black wasp attacks and paralyzes these insects and brings them to their underground nest as food for their young.
Is the Black Wasp Harmful to Humans?
In general, the black wasp is not harmful to humans.
Only the females have a stinger, and they use it only for hunting food for their young. They also do not have to defend others because they do not live in a colony. But, more importantly, they do not sting humans unless they are mistreated or if they are harmed or disturbed.
How to Treat a Black Wasp Sting?
If you have been stung by a black wasp, it is common that you feel some kind of sensation. This includes a sharp pain or burning, followed by itching, redness of the skin, or swelling.
If you are allergic to a wasp sting, the symptoms might be more pronounced but not life-threatening. However, a few hours of pain may be normal.
You can perform the following actions if the symptoms of a wasp sting are severe:
- If the pain or swelling increases for the next 2-3 days, you might need to go to the doctor for further examination.
- You should also consult a doctor if you are already experiencing nausea and vomiting.
- In some cases, you may do some self-medication, such as Benadryl, which can help you reduce the discomfort.
Fortunately, you can also treat a wasp sting if the symptoms are mild and moderate only.
Step 1: Wash the infected area with soap and water to remove the venom.
Step 2: To reduce the swelling, you may apply a cold pack to the wound.
Step 3: Clean and dry the wound and, if necessary, bandage it to prevent further infection. Keep it clean regularly.
Actions to Consider Before Getting Rid of Black Wasp
Before you can get rid of them, you must do the following:
Always Protect Yourself
Whether the black wasp nest is indoor or outdoor, you have to protect yourself first before taking action. As you probably know by now, the black wasp will only attack if they sense danger, and only the females may sting.
For self-protection, always wear protective clothing and footwear, gloves, and even goggles or safety glasses.
Identify Location of Nests
Identifying the location of the black wasp nests will make it easier and faster for you to get rid of them. In most cases, you will find them outdoors.
Aside from soft soil near the plants and bushes, they can also be found in other undisturbed areas. If you notice them flying around, they may be part of more than one colony, which may be dangerous.
But if you find them inside your house, they are very likely to eat ants and even your sweets, pet food, and leftover foods. They need sweet foods and protein in producing eggs.
For indoor nests, you may find them under the windows, overhangs, and underneath sidings. Nevertheless, they are usually fewer in numbers when indoors.
6 Effective Ways to Get Rid of a Black Wasp
The black wasp may not pose a threat to humans and the environment. But if they become unmanageable, it may be time for you to get rid of them. However, it may not be as easy as you think.
They can sense if danger is coming, and they know how to defend their territory. Nevertheless, here are some techniques you can try.
1. Eliminate Their Food Source
So far, the most humane way is to control their food source. Instead of having a flower garden in your backyard, you may plant them indoors. This will surely drive the black wasp away.
You may also seal your trash cans since they are ideal locations for leftover foods and food scraps. Just like ants, wasps love eating such kinds of foods.
2. Use a Trap or Non-Insecticide Spray
For indoor control, you may want to use a sticky tape trap . Once the black wasp passes through it, it can easily get stuck.
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Another type of trap is to make a nectar-like solution and place it in a container with no cover or lid. Once the wasp gets attracted to the aromatic smell, they will enter the container and be killed instantly.
You may also use non-insecticide spray and make sure they have no harmful chemicals. There are lots of nontoxic mint sprays available in stores, and all of them are equally effective.
In some cases, a simple cleaning spray can do the job or prevent them from flying. Nevertheless, don’t use a fly-swatter; they don’t work well.
3. Use Essential Oils
Essential oils are known to be ideal in exterminating black wasp nests. So far, peppermint oil appears to be the best among them all.
Step 1: Take a few drops of peppermint oil and mix them with some tablespoons of dishwashing soap.
Step 2: Add 1 cup of water and mix thoroughly.
Step 3: Spray the mixture on the known nest and check the result.
If there is no peppermint oil available, you can use other essential oils such as clove oil, geranium oil, cedar oil, or lemon oil. Although you may need a stronger mixture, they can be as effective as peppermint oil. This is effective against ants, spiders, bed bugs, and cockroaches. Additionally, it works best at night when the wasps are sleeping.
4. Drench Nests With Insecticides
Insecticides , when applied correctly, are certainly effective in eliminating black wasps. They are also great tools in preventing these diggers from coming back.
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However, most insecticides contain hazardous chemicals and should not be used inside the house, especially if you have elderly, small children, or people with asthma.
To protect yourself against toxic chemicals, you can do the following:
- Make sure you wear the correct PPE (Personal Protective Equipment).
- If possible, use a spray that can shoot up to 20-22 feet away from you.
- Stand away from the nest as far as possible, and create a steady stream of the spray to fully drench the nest. This will surely drown the stubborn black wasps.
5. Dust the Nests
This method also uses insecticides . But instead of spray or liquid chemicals, you will be using powder. With this technique, the risk of toxic chemicals dispersing in the air is reduced and safer than using the spray. But, you still need to wear the proper PPE. You will simply sprinkle the powder (dust) into the nest and leave it alone.
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However, dusting the nest in the ground may require you to do it repeatedly. It may also take a few days for all of the eggs to be killed and the nest destroyed.
Likewise, this method works best if the nest is still small and wasp infestation does not yet pose an immediate threat. In severe cases, spraying insecticides is a better solution.
6. Cover the Holes and Cracks
As mentioned earlier, black wasps dig a hole in the ground as their shelter for the young. Therefore, look for some small holes in your landscape or property. Then, cover them with gravel and soil so the black wasps will get stuck inside their nest and will eventually die. This will also prevent the queen black wasp to lay eggs in that area again.
On the other hand, small cracks inside the house are also ideal for black wasp nests. Although they seldom invade a house, these flying creatures may accidentally enter your house through openings or small holes in window screens, as well as roof and door cracks. The best time to cover it is late fall or early spring when they are less active.
While the above tips in getting rid of black wasps are effective, most of them also serve as preventive measures.
If the situation is getting worse despite doing all of them, you need to ask for help from professionals or pest control experts. They know exactly what to do, and you will also avoid the risk of getting stung by these black wasps.
List of Sources
Waddick, P. (2021). Great Black Wasp, Sphex pensylvanicus. University of Minnesota.
Baxendale, F. P., Kamble, S. T., Ellis, M. D. Stinging Wasps and Bees. University of Nebraska–Lincoln.
Great Black Wasp. Missouri Department of Conservation.