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Pest Control
Bee and Wasp Control
How to Get Rid of Ground Digger Wasps (Cicada Killers) from Your Lawn Download Article Co-authored by Chris Parker
Last Updated: October 22, 2024 Fact Checked
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Background Info
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Removal
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Coexistence
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This article was co-authored by Chris Parker. Chris Parker is the Founder of Parker Eco Pest Control, a sustainable pest control service in Seattle, Washington. Since 2016, Chris has been specializing in Integrated Pest Management and doesn’t use any chemicals for pest removal. He offers removal services for ants, rodents, fleas, spiders, wasps, and more. Chris is a certified Commercial Pesticide Applicator in Washington State and received his bachelor’s from the University of Washington. This article has been fact-checked, ensuring the accuracy of any cited facts and confirming the authority of its sources. This article has been viewed 1,660,714 times.
This article provides instructions on how to eradicate the ground-digger wasp (also known as the cicada-killer), should you have nest infestations on your lawn or property.
Steps
Part 1 Part 1 of 3:
Background Info
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1 Learn about ground digger wasps. Ground-digger wasps (GDWs) are very large (slightly larger than a green hornet) passive-aggressive wasps that "build" their nests in dry, unfertilized earth. They are typically large and black-bodied with yellow stripes on their back-end. When fully grown, they measure about one and a half inches (or more) in length with about a one and a quarter-inch wide wingspan.[1]XResearch source
2 Know the signs of ground digger wasps infesting your lawn or garden space.[2]X Expert Source Chris ParkerFounder, Parker Eco Pest ControlExpert Interview You'll know you've got ground-digger wasp nests when you see small granular mounds of dirt piled up anywhere from two-to-five inches in height. At the base of the mound of granular dirt will be a finger-sized hole with a "path" of dirt leading out from it.
The nests will be sporadically built throughout your lawn or garden, but will typically be in the driest areas and/or under longer grass/weeds or under growing flowers. GDWs do not like, but can live in, moist soil.
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3 Find out the local life cycle. In the Northeast US, the life-cycle of a ground-digger wasp is about one month beginning in mid-July and ending around mid-to-late August (depending on where you live, their life-cycle may start earlier or later). They go from young adults buzzing about play-attacking with each other, to full-size adults in about two-to-three weeks.[3]XResearch source
4 It's important to understand that they only sting when attacked. While very menacing looking, they are passive stingers, meaning only if very threatened will they attack and sting.[4]XResearch source You'd practically have to start digging into their nests while they're flying about for one to come at you and sting you (so, don't do that!). Otherwise, they tend to buzz about to check you out and to scare you away and they probably will the first time you encounter them. Know that they'd rather get on with their business of killing cicadas up in the trees than sting you.[5]XResearch source
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Removal
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1 While the method suggested here basically kills the wasps in their nests, there is no other (safe- for-nearby-pets) way to eradicate them. It is probable that you will still get nests from year-to-year, but only one, maybe two. The trick is to kill all of them while they're in their nests so their babies will not come back to the same place they were born.
2 Get the supplies. To eradicate an infestation of ground-digger wasps (GDWs), purchase from your local party store and supermarket, the following items: a) a large bag of white plastic knives, and b) up to three or four jug gallons of regular or lemon ammonia.
3 During the day, when the wasps are up hunting for cicadas in the trees, mark each nest you find with one of the plastic knives pushed into the ground as close to the hole of the nest as possible (without disturbing the hole). Leave enough of the knife sticking out of the ground so you can see it.
4 After 10:30 or 11pm, (later is better), that evening, using a flashlight, seek out the knives you placed and carefully pour about two-to-three cups of ammonia into each of the holes. At this time the wasps are probably nesting/sleeping, so you'll be catching them while in the nest. (You can stretch out the amount of ammonia by mixing a one-to-one ratio of water to ammonia. The diluted strength will still be enough to kill them.) Do not remove the knives.
5 The next day, repeat the process on any new nests that you find in the ground. You'll know the new nests from the old ones because you'll still have the knives in place from the night before. Once you've identified the new nests, remove the old knives.You may have to continually repeat the process depending on the original amount of wasps. Or you could hit the wasps with tennis rackets, knocking them to the ground then step on them.
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Coexistence
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1 Try this option if you're happy to let nature's creatures follow their natural cycles without freaking. First, this is a natural cycle and is part of nature's own way of dealing with a ballooning population of cicadas. Second, you can watch these interesting animals do their thing from the comfort of your own yard; they're raising their families just as every other natural creature tries to do.[6]XResearch source The way to cope if you leave them alone is very simple:[7]X Expert Source Chris ParkerFounder, Parker Eco Pest ControlExpert Interview
Do not aggravate them. Do not push or poke them, do not walk on them and do not attack them with anything.
Ignore them for two months. Just let them be as they dig up cicadas to feed their children. After two months, they'll be off.
Don't wander around with bare feet at night. Be sensible about walking in your garden; no yard is completely safe from prickles, stings and unpleasant things, so wear appropriate protection and practice sensible use of your yard.
Expert Q&A
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Question Are there any benefits of keeping ground digger wasps in my yard? Chris Parker Pest Control Specialist Chris Parker is the Founder of Parker Eco Pest Control, a sustainable pest control service in Seattle, Washington. Since 2016, Chris has been specializing in Integrated Pest Management and doesn’t use any chemicals for pest removal. He offers removal services for ants, rodents, fleas, spiders, wasps, and more. Chris is a certified Commercial Pesticide Applicator in Washington State and received his bachelor’s from the University of Washington. Chris Parker Pest Control Specialist Expert Answer Keeping ground digger wasps in your yard can actually be quite beneficial. Unlike some other wasp species, ground digger wasps are not hostile or protective over their nests. Similar to mud dauber wasps, allowing ground digger wasps to inhabit your yard without disturbance can be beneficial. Although you may be quite concerned or annoyed about the holes they create in your lawn, these holes actually provide excellent aeration for the soil, promoting healthy growth. So, instead of treating your entire yard with insecticide to eliminate them, I highly recommend letting ground digger wasps coexist in your yard. Thanks! We're glad this was helpful.Thank you for your feedback. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow Yes No Not Helpful 3 Helpful 7
Question How do I trap regular wasps? Chris Parker Pest Control Specialist Chris Parker is the Founder of Parker Eco Pest Control, a sustainable pest control service in Seattle, Washington. Since 2016, Chris has been specializing in Integrated Pest Management and doesn’t use any chemicals for pest removal. He offers removal services for ants, rodents, fleas, spiders, wasps, and more. Chris is a certified Commercial Pesticide Applicator in Washington State and received his bachelor’s from the University of Washington. Chris Parker Pest Control Specialist Expert Answer To trap regular wasps in your house, first I recommend sealing up any cracks and gaps around windows, doors, and vents to keep more from getting in. Then, set up wasp traps near windows or where you usually see them. You can make a simple trap with a plastic bottle and some sweet liquid bait like sugar water or fruit juice. The wasps will be drawn to the bait, go into the bottle, and get trapped. Check the traps regularly and get rid of the wasps you catch. If the problem continues, try using insecticidal sprays or call a professional pest control service for help. Thanks! We're glad this was helpful.Thank you for your feedback. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow Yes No Not Helpful 0 Helpful 2
Question Do cicada killer wasp sting humans? wikiHow Staff Editor Staff Answer This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness. wikiHow Staff Editor Staff Answer Cicada killer wasps are not aggressive toward human beings and prefer to retreat than attack. The female cicada killer wasp can sting humans but usually this only happens by accident; if trodden on or stuck in clothes or shoes by accident, the wasp may sting in self defense. The male wasp does not have a stinger, only a sharp spine to jab with. Take care where you step and don’t bother the wasps and they won’t bother you. Thanks! We're glad this was helpful.Thank you for your feedback. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow Yes No Not Helpful 8 Helpful 20
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Tips
You'll probably continue to have nests each year. However, if you repeat the same process above each year, your chances of having more nests the following years will reduce greatly. Thanks Helpful 0 Not Helpful 0
Share the instructions with your neighbors as chances are, they will also have GDWs and not know what they are or how to get rid of them. If they don't do anything, you'll have an infestation on the block before you know it. Thanks Helpful 0 Not Helpful 0
The more cicadas there are, the more GDWs you'll have. So, if you have 7-year cicada infestation cycles, the chances are you'll have a lot of GDW nests to deal with every seven years, unless you (and your neighbors) follow the method above to eradicate them. Or, you could just learn to live with it. Thanks Helpful 0 Not Helpful 0
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Warnings
Use a low-powered flash light when treating the nests at night. Even at night GDWs will fly towards a very bright light. Thanks Helpful 59 Not Helpful 46
Before you mow in the summer, check thoroughly through your yard to make sure you don't run into the holes when mowing. The loud sound of the mower, plus it vibrating on the ground will cause the GDWs to get aggravated. And when you go to mow over the hole and get over it, will cause GDWs to come out of the hole and sting you. Check for holes to make sure, being that the grass will be high and you won't be able to see the hole very well. Thanks Helpful 37 Not Helpful 31
Do not try to step on them; they're very fast when they're young adults/adults. As they get older, they tend to slow down, but can still sting if threatened. Thanks Helpful 48 Not Helpful 57
Do not agitate or aggravate a GDW. They may attack and sting you if their nests are threatened in any way. However be advised the males don't even have stingers, and the females sting under extreme provocation only. Wikipedia reports the female stings as relatively "weak". As such, it's important that you follow the above steps when you don't see any GDWs flying around; wait until they're either be up in the trees (during the day) or in the nest (if at night). Thanks Helpful 3 Not Helpful 2
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Things You'll Need
Large bag of white plastic party knives
Up to four or more gallons of ammonia (regular or lemon)
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Expert Interview
Thanks for reading our article! If you’d like to learn more about pest control, check out our in-depth interview with Chris Parker.
↑ Chris Parker. Founder, Parker Eco Pest Control. Expert Interview
About This Article
Co-authored by: Chris Parker Pest Control Specialist This article was co-authored by Chris Parker. Chris Parker is the Founder of Parker Eco Pest Control, a sustainable pest control service in Seattle, Washington. Since 2016, Chris has been specializing in Integrated Pest Management and doesn’t use any chemicals for pest removal. He offers removal services for ants, rodents, fleas, spiders, wasps, and more. Chris is a certified Commercial Pesticide Applicator in Washington State and received his bachelor’s from the University of Washington. This article has been viewed 1,660,714 times. 7 votes - 100% Co-authors: 33Updated: October 22, 2024 Views: 1,660,714 Categories: Bee and Wasp ControlArticle SummaryX
To get rid of ground digger wasps or cicada killers from your lawn, mark every hole you see with a plastic knife. Then, at 11 p.m. or later, pour a solution of 50% vinegar and 50% water into each hole, putting 2 to 3 cups in each hole. Come back out the next day, mark any new holes you see, and repeat the process until they are all dead. Keep reading for tips on how to deal with them if you decide not to kill them.Did this summary help you?YesNo
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Reader Success Stories
Anonymous
Aug 3, 2017
"This article is spot-on with help identifying GDWs. I will be trying the described ammonia treatment tonight, as my yard is where the family and pets all play. Prior to reading this article, I have become quite a good shot with a BB rifle in effort to take my backyard back. These critters have filled my windows with a lot of long, sad, fearful faces on the inside looking out at the overtaken oasis they once knew. Although target practice is fun and good, it's not working for what we need. Thanks."..." more
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Yes No Advertisement Cookies make wikiHow better. By continuing to use our site, you agree to our cookie policy. Co-authored by: Chris Parker Pest Control Specialist Co-authors: 33Updated: October 22, 2024 Views: 1,660,714100% of readers found this article helpful. 7 votes - 100% Click a star to add your vote
Anonymous
Aug 3, 2017
"This article is spot-on with help identifying GDWs. I will be trying the described ammonia treatment tonight, as my yard is where the family and pets all play. Prior to reading this article, I have become quite a good shot with a BB rifle in effort to take my backyard back. These critters have filled my windows with a lot of long, sad, fearful faces on the inside looking out at the overtaken oasis they once knew. Although target practice is fun and good, it's not working for what we need. Thanks."..." more
Susan Sandeen
Jul 31, 2017
"I found some of these today in the yard, one was carrying a locust. I watched it drop the dead locust, then go in a hole in the ground, come back up and drag the locust into the hole. The wasp then came out and started throwing dirt backwards into the hole. I thought them to be beautiful, so I looked up information in your article. I wasn't interested in killing them, only wanted to know more about them, as I believe in leaving things alone, observing and learning from them. Thank you."..." more Rated this article:
Alana Z.
Jul 22, 2017
"This article was not only helpful in terms of explaining well how to get rid of an unusual species of wasp, but it also provided the important info that this solitary species is docile, despite its fearsome appearance, & that it is beneficial to have around. I am very grateful that this article also provided information on how to humanely co-habitate with them until their short life cycle in the summer is over. No need to kill something neat that won't likely harm me. Many thanks! :)"..." more Rated this article:
Leigha Doran
Jul 24, 2016
"Thank you so much for this information. I thought that we had an infestation of hornets, but after reading this article I realized they are GDW and not hornets. It described them perfectly--to a T! With this newfound info, I am a little relieved, as I think these will be a little easier (and less dangerous) to remove versus the hornets. Thanks again!"..." more
Sara Youngblood
Jul 24, 2016
"I have these wasps every year and they are getting worse. I was happy to find a method that won't harm my dogs. Poisons were out of the question, but I am afraid of one of my small dogs getting stung. Did our second treatment tonight and hoping we see some positive results."..." more Share yours! More success stories Hide success stories
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Co-authored by: Chris Parker Pest Control Specialist This article was co-authored by Chris Parker. Chris Parker is the Founder of Parker Eco Pest Control, a sustainable pest control service in Seattle, Washington. Since 2016, Chris has been specializing in Integrated Pest Management and doesn’t use any chemicals for pest removal. He offers removal services for ants, rodents, fleas, spiders, wasps, and more. Chris is a certified Commercial Pesticide Applicator in Washington State and received his bachelor’s from the University of Washington. This article has been viewed 1,660,714 times. 7 votes - 100% Co-authors: 33 Updated: October 22, 2024 Views: 1,660,714 Categories: Bee and Wasp Control Article SummaryX
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1 Learn about ground digger wasps. Ground-digger wasps (GDWs) are very large (slightly larger than a green hornet) passive-aggressive wasps that "build" their nests in dry, unfertilized earth. They are typically large and black-bodied with yellow stripes on their back-end. When fully grown, they measure about one and a half inches (or more) in length with about a one and a quarter-inch wide wingspan.[1] 
2 Know the signs of ground digger wasps infesting your lawn or garden space.[2] You'll know you've got ground-digger wasp nests when you see small granular mounds of dirt piled up anywhere from two-to-five inches in height. At the base of the mound of granular dirt will be a finger-sized hole with a "path" of dirt leading out from it. 
3 Find out the local life cycle. In the Northeast US, the life-cycle of a ground-digger wasp is about one month beginning in mid-July and ending around mid-to-late August (depending on where you live, their life-cycle may start earlier or later). They go from young adults buzzing about play-attacking with each other, to full-size adults in about two-to-three weeks.[3] 
4 It's important to understand that they only sting when attacked. While very menacing looking, they are passive stingers, meaning only if very threatened will they attack and sting.[4] You'd practically have to start digging into their nests while they're flying about for one to come at you and sting you (so, don't do that!). Otherwise, they tend to buzz about to check you out and to scare you away and they probably will the first time you encounter them. Know that they'd rather get on with their business of killing cicadas up in the trees than sting you.[5] Advertisement 
1 While the method suggested here basically kills the wasps in their nests, there is no other (safe- for-nearby-pets) way to eradicate them. It is probable that you will still get nests from year-to-year, but only one, maybe two. The trick is to kill all of them while they're in their nests so their babies will not come back to the same place they were born. 
2 Get the supplies. To eradicate an infestation of ground-digger wasps (GDWs), purchase from your local party store and supermarket, the following items: a) a large bag of white plastic knives, and b) up to three or four jug gallons of regular or lemon ammonia. 
3 During the day, when the wasps are up hunting for cicadas in the trees, mark each nest you find with one of the plastic knives pushed into the ground as close to the hole of the nest as possible (without disturbing the hole). Leave enough of the knife sticking out of the ground so you can see it. 
4 After 10:30 or 11pm, (later is better), that evening, using a flashlight, seek out the knives you placed and carefully pour about two-to-three cups of ammonia into each of the holes. At this time the wasps are probably nesting/sleeping, so you'll be catching them while in the nest. (You can stretch out the amount of ammonia by mixing a one-to-one ratio of water to ammonia. The diluted strength will still be enough to kill them.) Do not remove the knives. 
5 The next day, repeat the process on any new nests that you find in the ground. You'll know the new nests from the old ones because you'll still have the knives in place from the night before. Once you've identified the new nests, remove the old knives.You may have to continually repeat the process depending on the original amount of wasps. Or you could hit the wasps with tennis rackets, knocking them to the ground then step on them. Advertisement 
1 Try this option if you're happy to let nature's creatures follow their natural cycles without freaking. First, this is a natural cycle and is part of nature's own way of dealing with a ballooning population of cicadas. Second, you can watch these interesting animals do their thing from the comfort of your own yard; they're raising their families just as every other natural creature tries to do.[6] The way to cope if you leave them alone is very simple:[7] 
Chris Parker Pest Control Specialist Chris Parker is the Founder of Parker Eco Pest Control, a sustainable pest control service in Seattle, Washington. Since 2016, Chris has been specializing in Integrated Pest Management and doesn’t use any chemicals for pest removal. He offers removal services for ants, rodents, fleas, spiders, wasps, and more. Chris is a certified Commercial Pesticide Applicator in Washington State and received his bachelor’s from the University of Washington. 
wikiHow Staff Editor Staff Answer This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.