The Kudzu Bug, a small olive-green insect with brown speckles, has become a concerning agricultural pest in recent years. Originally introduced in Georgia, this critter has since spread to neighboring states, causing significant damage to soybean crops and other plants, such as wisteria and vetches source.
Belonging to the “true bugs” group, Kudzu Bugs have piercing-sucking mouthparts, allowing them to feed on a wide range of legumes source. Despite their appetite for Kudzu, a notorious invasive plant species, their impact on other crops and native vegetation has raised concerns among farmers and environmentalists alike.
Kudzu Bug Identification and Distribution
Megacopta Cribraria
The Kudzu Bug, scientifically known as Megacopta Cribraria, is a small, greenish-brown insect native to Asia. They are oval-shaped and approximately 4-6mm in length.
- Features:
- Greenish-brown color
- Oval shape
- 4-6mm in length
Countries and States Affected
The Kudzu Bug is known to feed on the Kudzu plant, which is native to China but has become an invasive species in the southeastern United States. The bug was first identified in the United States in Georgia in 2009 and has since spread to several other states. The affected states include:
- Georgia
- South Carolina
- North Carolina
- Tennessee
- Florida
- Virginia
- Alabama
| State | Year of First Detection |
|---|---|
| Georgia | 2009 |
| South Carolina | 2010 |
| North Carolina | 2010 |
| Tennessee | 2012 |
| Florida | 2013 |
| Virginia | 2013 |
| Alabama | 2014 |
The Kudzu Bug’s rapid spread has caused concerns due to its potential impact on agricultural crops, particularly soybeans, and the overall ecosystem. It is essential to monitor their distribution and implement management strategies to control their population.
Kudzu Bug Life Cycle
Eggs
Kudzu bugs lay small eggs that are barrel-shaped and pale green, often found in groups on the host plant’s leaves and stems. A female can lay up to 200 eggs during her lifetime. The eggs hatch into nymphs within around a week.
Nymphs
Nymphs are the immature stage of the kudzu bug. They are bright green and have piercing-sucking mouthparts for feeding on plants. As they grow, nymphs molt through several instars, each marked by color and size changes. This process takes about 2 to 3 weeks before they mature into adults.
Adults
Adults are about 4 to 6 mm long, olive-green colored with brown speckles, and oblong in shape (source). Kudzu bugs can feed on various legumes, including soybeans, wisteria, and other bean species. As temperatures cool in the fall, adults seek overwintering sites, including the bark of trees, leaf litter, and cracks in buildings.
Pros and cons of kudzu bug:
- Pros: Can potentially control the invasive kudzu plant.
- Cons: Harmful to economically important crops, such as soybeans.
Comparison between kudzu bug life stages:
| Life Stage | Size/Color | Feeding Habits | Duration |
|---|---|---|---|
| Eggs | 1 mm | Not applicable (undeveloped) | 1 week |
| Nymphs | 2-5 mm, Green | Feed on plant juices | 2-3 weeks |
| Adults | 4-6 mm, Olive-green | Feed on legumes | A season+ |
In conclusion, the kudzu bug life cycle consists of eggs, nymphs, and adults, with each stage having distinct characteristics and feeding habits.
Agricultural Impact
Soybean Fields
Kudzu bugs are a severe economic pest that affects soybean fields in states like Georgia, North Carolina, and South Carolina ¹. Farmers face challenges controlling the kudzu bug population and preventing damage to their soybean crops.
These insects are known to feed not only on kudzu but also on a wide variety of legumes, including soybeans and various bean species ².
Yield Losses
Kudzu bug infestation can lead to significant yield losses for soybean farmers. For example:
- Reduced soybean production due to damaged plants
- Increased costs for pest control methods
Pros of Kudzu Bug Control Methods:
- Reduces yield losses and damage to soybean plants
Cons of Kudzu Bug Control Methods:
- May require increased pesticide use
- Some control methods may be ineffective or slow to show results
To help understand the impact of kudzu bugs on soybean production, see the comparison table below:
| Factor | Kudzu Bug-Infested Soybean Fields | Healthy Soybean Fields |
|---|---|---|
| Yield | Reduced due to damaged plants | Higher yields |
| Costs | Increased for pest control | Lower costs |
| Quality | Lower due to pest damage | High quality |
¹ https://content.ces.ncsu.edu/kudzu-bug
² https://content.ces.ncsu.edu/kudzu-bug-a-nuisance-and-agricultural-pest
Host Plants and Infestation
Kudzu Vine
Kudzu bugs primarily feed on kudzu vine, an invasive weed introduced to the United States in the late 1800s1. The insects:
- Pierce the vine to extract water and nutrients
- Can stunt the growth of kudzu plants
Wisteria
Wisteria is another host plant of kudzu bugs2. The bugs:
- Particularly target young foliage
- May reduce the overall vigor of the plant
Legumes and Other Edibles
Kudzu bugs also infest legume plants2, including:
- Green beans
- Peas
- Soybeans (severe economic pest1)
In addition to the host plants mentioned above, kudzu bugs may occasionally use other plants as “rest areas” during migration3.
Comparing the host plants:
| Host Plant | Severity of Infestation |
|---|---|
| Kudzu Vine | High |
| Wisteria | Moderate |
| Legumes | Moderate-High |
| Other | Low |
Control and Management
Chemical Control
Chemical control is one method of managing kudzu bugs. Insecticides such as bifenthrin and permethrin can be applied by an exterminator. Some pros and cons of chemical control are:
- Pros:
- Effective in reducing kudzu bug populations
- Works quickly
- Cons:
- May harm non-target organisms
- Potential environmental concerns
Biological Control
An alternative control method is biological control. Kudzu bugs were not intentionally introduced to manage kudzu vine; however, they can help control its growth. Natural enemies such as parasitic wasps help to manage kudzu bug populations.
Physical and Cultural Control
Physical and cultural control methods focus on preventing kudzu growth and bug habitat. Some strategies include:
- Removing kudzu vine manually or mechanically
- Planting competitive species that can outcompete kudzu for resources
- Regular monitoring to detect kudzu bug infestations
USDA has found that combined management programs can control kudzu vines more effectively than individual methods.
| Method | Advantages | Disadvantages |
|---|---|---|
| Chemical Control | Fast-acting, effective on kudzu bugs | Can harm non-target organisms |
| Biological Control | Targets specific pests, eco-friendly | May not eliminate kudzu bug entirely |
| Physical & Cultural | Prevents kudzu growth, manages habitat | Labor-intensive, requires monitoring |
Kudzu Bug Interactions with Humans
Nuisance Pest
The Kudzu Bug, also known as the globular stink bug, is a true bug belonging to the family Plataspidae. This insect is a nuisance pest for several reasons, including:
- Emitting a foul odor when disturbed or crushed
- Congregating on light-colored surfaces, especially on the exterior of homes
- Damaging various plants with their piercing mouthparts
One notable comparison is between Kudzu Bugs and Boxelder Bugs, as both pests tend to gather on homes and emit unpleasant odors. However, they are different species with distinct appearances and damage potential to plants.
Home and Garden Issues
The Kudzu Bug is not only bothersome outside the home, but can also cause problems in gardens. They have a preference for plants like kudzu, wisteria, and soybean crops, which they can significantly damage. Gardeners might encounter some resident_issues when dealing with these pests.
Manual removal is one option for controlling Kudzu Bugs, but care should be taken to avoid skin contact as their secretions might cause irritation. Using gloves when removing them from plants or surfaces is highly recommended.
Another method often employed by homeowners is using soapy water to drown the insects. This involves mixing a soap and water solution in a spray bottle, then spraying it directly onto the bugs to kill them.
It’s important to note that Kudzu Bugs are not beetles and should not be confused with them. A key difference between the two is their mouthparts – true bugs have piercing mouthparts, while beetles have chewing mouthparts.
Here’s a comparison table to help differentiate Kudzu Bugs from beetles:
| Feature | Kudzu Bug | Beetle |
|---|---|---|
| Mouthpart type | Piercing | Chewing |
| Family | Plataspidae | Coleoptera |
| Odor | Yes | No |
Although Kudzu Bugs are not edible, some people might try to store them in a freezer to control their populations. This method is not recommended, as freezing temperatures might not effectively kill the bugs, and it’s best to utilize other means of pest control.
In conclusion, Kudzu Bugs create various issues for humans, ranging from being a smelly nuisance to causing damage in home gardens. While there are several ways to manage their populations, it’s crucial to identify the correct insect and use appropriate control methods.
Research and Education
Kudzu bugs, an invasive insect species, have rapidly spread across the Southeastern United States. They are primarily known for being pests in soybean crops and feeding on the invasive kudzu plant1. Clemson University and the Edisto Research and Education Center have conducted studies on the biology, distribution, management, and impact of the bugs on agriculture and environment2.
These insects have several distinguishing features:
Kudzu bugs lay egg masses on kudzu plant nodes with an incomplete metamorphosis life cycle5. Their presence can become a nuisance when they cluster on white house siding, white cars, and other surfaces6.
Management Methods
Controlling kudzu bugs requires proper timing and usage of different strategies. Some methods include:
- Using hot, soapy water to remove bugs from surfaces
- Employing spray pesticides that are pyrethrin-based
For more severe infestations, consider using chemical insecticides like lambda-cyhalothrin7. However, these should be used carefully as they can potentially harm aquatic life when used near storm drains or water bodies8. Keep in mind that while kudzu bugs are pests, they also play a role in controlling the invasive kudzu plant, similar to how cluster flies feed on plant pests9.
Bug Control Recommendation Tool
Footnotes
- USDA ARS ↩ ↩2 ↩3
- NC State Extension Publications ↩ ↩2 ↩3
- University of Georgia ↩ ↩2
- https://content.ces.ncsu.edu/kudzu-bug-a-nuisance-and-agricultural-pest ↩
- https://extension.entm.purdue.edu/publications/E-253/E-253.pdf ↩
- https://catalog.extension.oregonstate.edu/sites/catalog/files/project/pdf/em9139.pdf ↩
- https://www.epa.gov/pesticides/pesticides-and-public-health ↩
- https://www.extension.purdue.edu/extmedia/ID/ID-283-W.pdf ↩
- https://www.entomology.cornell.edu/Extension/PDFs/Resource%20Guides/Cluster.pdf ↩
8 Comments. Leave new
Ok posted comment in the fall about these Lablab’s. The mild winter did not help. When the temp hit low 80 for a couple of days-they are now out in force. How can we get rid of them?
Hi Roland,
We do not give extermination advice, but perhaps one of our readers may be able to provide you with information. Since they are found in association with the invasive kudzu vines, you might want to try eliminating the kudzu you have growing on your property.
also referred to as a Kudzu bug. They also secrete an interesting pheromone.
from my understanding they a kuzuu beetles . I think that is how you spell it. they were put out by the gov to cut down on some of the kuzuu that has overtaken native species. kuzuu was brought here from some where like china or japan and that’s where the beetles are from also, I think
They are not beetles, but true bugs in the order Hemiptera. While we are aware of the common name Kudzu Bug, Megacopta cribraria, Lablab Bug is also an accepted common name. This is the first we have heard that they are an intentional introduction. According to BugGuide: “native to e./se. Asia, adventive in the US & Australia” and “highly invasive species of mixed impact: it seems to prefer kudzu (a highly invasive and damaging plant), but can also become a serious pest of leguminous crops.” If this was a government introduction, it was a goof. We decided to research this. According to Eat the Invaders: “Kudzu was first brought to the U.S. by Japan, which promoted it as an ornamental and as a forage crop at the 1876 Centennial Exposition in Philadelphia. By 1900, its fragrant grape-scented purple flowers and the vine’s ability seemingly to cover a trellis in a night had made it popular on porches throughout the Southeastern US. Despite the warning of a visionary biologist named David Fairchild in 1902 that this vine could become something new to the scientific community, an “invasive species,” kudzu was planted through the South, first as livestock feed, then as erosion control along highways. Farmers were paid to plant the stuff in the 1940s. … But recently the story took a fascinating turn. Invasives often thrive in the absence of native predators, competitors, or parasites. In 2009, what’s been dubbed the kudzu bug was identified in the South, a brand new invader from Asia. It eats kudzu–joy of joys–but that’s not all it eats. It devours soybeans, too, a huge moneymaker of a crop. What’s the solution?” According to North Carolina Cooperative Education: “The kudzu bug (bean plataspid, globular stinkbug) was first discovered on kudzu vine in the vicinity of Atlanta, Georgia, during the fall of 2009. From this initial accidental introduction (this pest was NOT intentionally introduced to manage kudzu), kudzu bug has quickly become established as a severe economic pest of soybean in Georgia, North Carolina, and South Carolina.”
Do lablab bugs stink when you kill them?? Bc that just happens to a bug I killed. Didn’t know what it was so looked on here. But I had to spray all around the area I killed it with some perfume is this a lablab bug?
Thanks for help identifying my lone Lablab bug found on my bed in late Nov in eastern Ky. Hopefully there are no “friends” lurking about.
I have no close kudzu but it’s nearby on the river bank and in wooded areas.
We had an abundance of the plant in our garden in Greenville , SC during the 1990’s where we saw tree roaches snd red fire ants.
Thank you
I have these all over my house in NJ & i think they are biting us HELP! 2 months of cleaning, spraying Ortho Home Defense by the gallons & 3 fog/bomb events in the house. Still seeing them, ugh!!