The 9 Best Weed Killers of 2023

We have conducted extensive research and evaluation on a variety of weed killers to help you maintain a beautiful landscape year-round, free of invasive weeds, crabgrass, dandelions, or sedges. Our evaluation criteria included ease of use, length of protection, and value for the price.

A top-quality weed killer should effectively eliminate weeds without harming the plants in your garden or damaging your lawn. Achieving this balance is no small feat, but our comprehensive evaluation has identified the products that deliver the best results, so you can enjoy a pristine outdoor space.

The 9 Best Weed Killers of 2023：Our Top Picks

Best Overall	Doctor Kirchner Natural Weed & Grass Killer
Best for Lawns	Southern Ag Amine 2,4-D WEED KILLER
BEST BANG FOR THE BUCK	Calyptus 45% Pure Super Concentrated Vinegar
Best Indoor	Ortho Weed B Gon Chickweed
BEST FOR LAWN WEEDS	Preen 2164174 Garden Weed Preventer
BEST FOR GRAVEL AREAS	Bonide Captain Jack’s Deadweed Brew Concentrate
Best for Hot, Humid Weather	Ortho WeedClear Lawn Weed Killer
BEST PRE-EMERGENT	Fertilome 8 Oz Over The Top Grass Killer
Best Natural	Green Gobbler 20% Vinegar Weed & Grass Killer

For those who prioritize natural and organic options, weed killers with these active ingredients can be a safer choice for maintaining lawns, gardens, and landscapes. We put several products to the test and found them to be highly effective. Keep reading to discover more about these weed killers, our results, and why we believe they are some of the top options available for weed control.

1.Best Overall:Doctor Kirchner Natural Weed & Grass Killer

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What We Like

• Contains salt, vinegar, and soap for longer-lasting control
• No mixing is necessary
• Kills weeds within hours

What We Don’t Like

• Frequent applications on concrete cause etching
• Corrosive to metal and rubber

This one-gallon container of Doctor Kirchner Natural Weed Killer is ready to use straight out of the box. It is a non-discriminatory weed killer that can be applied to all plants on contact. The formula is composed of natural ingredients such as salt, vinegar, soap, and water. When applied directly to foliage with a trigger-spray bottle or garden pressure sprayer, the solution is more effective at penetrating plant tissue and breaking down the waxy leaf cuticle, resulting in a more thorough kill than vinegar alone. Although both the vinegar and soap are biodegradable, using this product frequently in a confined area could lead to a buildup of salt in the soil.

We tested Doctor Kirchner Weed Killer in various settings, such as mulched landscape beds, tree rings, and along a fence line. We used a garden sprayer with the nozzle set to a coarse spray. Weeds, including broadleaf and grassy varieties, as well as woody vines like Virginia creeper and poison ivy, were present. Within two hours of application, most of the weeds began to discolor, and within 24 hours, they were completely browned out. The effects were less consistent on weeds with thicker, tougher leaves, such as English ivy, but even those plants were defoliated within three days.

The vinegar scent of the spray was strong and slightly irritating, which could become overwhelming if the nozzle was set to mist. The scent lingered in the yard for about a day. Doctor Kirchner Weed Killer proved to be the most effective weed killer we tested, with a combination of quick-killing action and minimal regrowth.

2.Best for Lawns:Southern Ag Amine 2,4-D WEED KILLER

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What We Like

• Effective against many hard-to-get-rid-of weeds
• Works on all grass types
• Does not burn grass

What We Don’t Like

• Toxic, requires re-entry period
• Not rainproof

Southern Ag 2,4-D is a reliable solution to maintain the appearance of your pristine lawn by eliminating unsightly weeds. This concentrated formula specifically targets broadleaf weeds such as clover, dandelions, and crabgrass. The product is budget-friendly, requiring only a tablespoon per gallon of water.

Upon dilution and application, it takes only three days for the formula to eliminate the weeds completely, with visible results apparent within 30 minutes. However, it is essential to note that 2,4-D is toxic to both humans and pets. For safety reasons, it is advised that you do not use the treated area for 24 hours.

3.BEST BANG FOR THE BUCK：Calyptus 45% Pure Super Concentrated Vinegar

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What We Like

• Contains only acetic acid (vinegar) and distilled water
• 45 percent concentrate makes up to 9 gallons
• Weeds die within hours of application
• Can also be used for household cleaning
• Budget-friendly

What We Don’t Like

• Frequent applications on concrete cause etching
• Intense vinegar smell may become overpowering
• Requires personal protective equipment while mixing and spraying

Eliminating weeds can be done in an eco-friendly and cost-effective manner with Calyptus weed killer. To use this biodegradable product, simply dilute one part of the highly concentrated vinegar with up to eight parts water and apply it with a sprayer. The high acid content effectively erodes leaf cells, drying out foliage within 2 to 24 hours. This weed killer is most effective in mulched beds and planted areas but is not ideal for use on patios, sidewalks, or driveways. It may cause etching when repeatedly in contact with concrete, natural stone, mortar, and some other hardscape surfaces.

When using this concentrated Calyptus vinegar, it is crucial to dilute it carefully, work outdoors for better ventilation, and wear goggles and rubber gloves to protect against eye and skin irritation. It is also essential to ensure that all of the sprayer’s interior parts are made of plastic to avoid damage from the acid to rubber and metal. When we tested it, we adjusted the sprayer nozzle to a coarse pattern and applied the weed killer on herbaceous weeds in garden pathways and vacant garden beds. Small weeds died within a few hours, while established Bermuda grass runners browned out in 5 to 6 hours, with only the exterior portions of thicker grass turning brown.

The smell of vinegar from the weed killer was potent, requiring us to leave the area during treatment. The strong odor persisted in the yard for around 24 hours. Compared to other weed killers we tested, Calyptus killed more weeds for less money.

4.Best Indoor:Ortho Weed B Gon Chickweed

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What We Like

• Targets tough weeds such as dandelions
• Rainproof within an hour
• Easy to use
• Inexpensive

What We Don’t Like

• Advised not to use around pets

Ortho Weed B Gon is a selective herbicide that effectively targets weeds without harming the grass. It can kill over 200 weeds, including dandelions and clover, at a great price point. The product comes in various sizes, and a single gallon can cover up to 64,000 square feet, almost the size of a soccer field.

This product works by killing weeds at the roots, and you should see results the same day. Some users have even reported noticeable weed demise within just 30 minutes. Ortho Weed B Gon is perfect for northern and southern grass types, and the formula is rainproof within an hour.

5.BEST FOR LAWN WEEDS：Preen 2164174 Garden Weed Preventer

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What We Like

• Can use around edibles
• Easy to apply
• Contains plant food
• Prevents 25+ kinds of broadleaf weeds

What We Don’t Like

• Does not control present weeds
• Not rainproof

Preen Garden Weed Preventer is specifically formulated to prevent weeds from sprouting in your flower beds, around trees, or even in your vegetable garden. Its patented blend contains a plant fertilizer that nourishes your plants while keeping weeds at bay, protecting against nearly 30 broadleaf weeds. The product comes in a granular format, making it less likely to blow onto your lawn.

The standout feature of Preen Garden Weed Preventer is how easily it spreads. The bottle comes with a convenient shaker cap that allows you to apply it evenly over the intended area. Once applied, you can simply add water and let it work its magic. Another advantage is that you can use Preen at any time during the year, and it is safe to use around vegetables, bulbs, and over 200 other flowering plants.

6.BEST FOR GRAVEL AREAS：Bonide Captain Jack’s Deadweed Brew Concentrate

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What We Like

• Plant-derived active ingredients
• Noncorrosive to metal sprayer parts
• Rapid dieback of annual and perennial weeds
• Concentrate makes up to 32 gallons of weed killer

What We Don’t Like

• Requires mixing with water

Captain Jack’s Deadweed Brew is a powerful weed killer that effectively targets both broadleaf and grassy weeds. The active ingredient, capric acid, which is derived from coconut and palm kernel oils, dries out the foliage to eliminate weeds. This makes it ideal for gravel areas that are prone to weeds. The concentrate is available in a quart-size package, complete with a measuring cup, and can make up to 8 gallons of spray-on contact weed killer when mixed with water.

We tested Deadweed Brew Concentrate on a secondary gravel driveway that was overgrown with weeds. To prepare the site, we mowed down the weeds with a string trimmer and removed the clippings. After 3 days, we applied the spray over the entire weed zone with a backpack sprayer, using a coarse spray pattern. Within 4 hours, the weeds had turned pale greenish brown, and by the next morning, they were completely brown.

One of the benefits of using Captain Jack’s Deadweed Brew is that it is odor-free, even at full strength. This concentrate is a great choice for anyone who needs to eliminate a large number of weeds over a large area without being exposed to noxious odors.

7.Best for Hot, Humid Weather:Ortho WeedClear Lawn Weed Killer

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What We Like

• Easy to use
• Intended for hot climates
• Rainproof
• 200+ weeds controlled

What We Don’t Like

• Not recommended for northern grasses

Ortho has developed a unique variant of its Weed Clear herbicide to address the challenges of hot and humid conditions common in the southern United States. This specially formulated product has been extensively tested to effectively eradicate weeds without harming the major grass types commonly grown in the region.

With Ortho Weed Clear for the South, you need not worry about rain as it becomes rainproof within an hour of application. This powerful herbicide effectively eliminates over 200 species of broadleaf weeds, including stubborn dandelions and crabgrass. However, since it contains 2,4-D, a chemical that can be harmful to humans and pets, caution should be taken in areas with heavy foot traffic.

8.BEST PRE-EMERGENT：Fertilome 8 Oz Over The Top Grass Killer

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What We Like

• Easy to use
• Targeted weed control
• 200 + weeds controlled

What We Don’t Like

• Not rainproof
• Proper application is essential

Maintain your flower beds in pristine condition with Fertilome Over the Top Grass Killer II. This 16-ounce concentrate comes with a hose attachment for convenient application. Simply attach it to your garden hose, spray the formula onto weeds and grasses, and you’re done! This herbicide is selective, meaning it targets pesky weeds without harming your flowers.

Fertilome Over the Top Grass Killer II is versatile and can be used around vegetable gardens, flower beds, mulched beds, and tree rings, as well as on cracks in driveways, walkways, and patios. However, it is not rainproof, so it’s best to apply it when the forecast is clear of rain. Mowing the area before application is also recommended for optimal results.

9.Best Natural:Green Gobbler 20% Vinegar Weed & Grass Killer

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What We Like

• Contains no harsh chemicals
• Can be used in various places
• No dilution needed

What We Don’t Like

• No smaller sizes available

Green Gobbler Vinegar Weed and Grass Killer is an eco-friendly and glyphosate-free weed killer made entirely from natural ingredients derived from corn. It effectively eliminates a wide range of common weeds and grasses, including crabgrass, dandelions, clover weeds, white clover, mold, and more.

Our real-world testing showed that Green Gobbler can be applied on driveways, sidewalks, concrete, mulch, and flower beds with great results. You can expect to see noticeable results in less than 24 hours, and the manufacturer offers a 100% satisfaction guarantee. However, keep in mind that it can harm all plants and grasses, so you need to use it selectively on the weeds you want to get rid of.

What to Consider When Choosing the Best Weed Killer

Weed killers are not interchangeable. Some herbicides kill on contact, while others work systemically. Some selectively kill specific types of weeds, and others kill a broad spectrum of vegetation. Before buying a weed killer, be sure to consider the types of weeds that need to be controlled, where they are growing, their growth stage, and the weather conditions.

Even a well-reviewed weed killer will deliver poor results if it is applied incorrectly or if the product is not designed to solve a specific weed problem. For instance, a vegetation killer designed to eliminate and prevent driveway weeds would devastate a lawn, while a lawn weed killer would be ineffective against some of the tough weeds that grow in concrete cracks. To maximize product performance and minimize the risk of herbicide failure, factor in weed-killer type, weeds it should attack, and other properties when choosing the right commercial weed killer.

Type

Choosing the right weed killer for the job is crucial. Ahead, learn more about the different types of herbicides.

• Contact weed killers work by destroying the part of the plant to which they are applied, usually within hours to days. They’re commonly used on annual weeds, such as crabgrass, nettle, and chickweed, which are easier to kill than perennial plants and generally die when their foliage or stems are destroyed.
• Systemic weed killers are absorbed into weeds and circulate within the plant’s interior after application, usually down to the roots. This destroys the entire plant from the bottom up, but it can take several days to several weeks to see results. Unlike contact weed killers, systemic products generally don’t state the specific period of time it takes to kill weeds. They’re a good option for perennial weeds such as dandelion, poison ivy, or ragweed, which are typically more difficult to kill because of their deeper roots.
• Residual weed killers, also often referred to as pre-emergent herbicides, provide extended weed control. They prevent weeds from germinating and growing for a period of between 3 and 12 months. While residual weed killers provide an effective barrier against new weed growth, they also prevent germination of any new seeds from favorable plants.
• Selective weed killers are meant to destroy weeds but not turfgrass or other beneficial plants in the vicinity, making them the best weed killer for lawns. This type of weed killer is a good option for eradicating, for example, dandelions or thistles on the lawn or in a flower bed.
• Nonselective weed killers eradicate weeds along with any other plants in the application area. Use them along the fence or pool, or in driveway or sidewalk cracks, where beneficial plants aren’t at risk.

Chemical vs. Natural

While chemical weed killers are far more common, natural herbicides can also be effective at weed control. Natural weed killers use ingredients like vinegar, which burns weed foliage with its acidic pH, and herbicidal soaps that dry out the weeds. Natural weed killers make an excellent option for situations where a nontoxic formula is crucial, such as in a vegetable garden, children’s playground, or dog park. The ingredients in natural and organic herbicides are biodegradable, so they pose the least threat to humans and animals and do not pollute waterways.

Natural herbicides are nonselective and most effective against young, tender weed seedlings. Chemical herbicides, on the other hand, can kill weeds without harming other plants, such as a lawn. Systemic herbicides are chemicals that are easily absorbed through the foliage into the plant vascular system where they travel down to the roots for a thorough kill after one application, making them more effective against established weeds. Many chemical herbicides have a residual effect that will prevent weeds from growing back for months or even years after their application. But chemical herbicides are linked to unintended negative effects and therefore should be used with caution.

Form

Weed killers typically come in either a liquid spray or granular formulation.

• Liquid sprays come in bottles with spray nozzles that are ready to use as well as concentrates that must be mixed before use. Some weed killers use spray bottles that attach to a standard garden hose for treating large areas, like entire lawns. Liquid weed killers are very effective because they are sprayed directly on the offending weed and can cling to even the smallest leaves.
• Granular weed control is usually distributed with a spreader, which makes it easier to apply over a large area, such as an entire lawn. Granules can also be mixed with dry fertilizer, a combo that kills weeds as it nourishes. This ability to distribute herbicide and fertilizer over large areas makes granular forms ideal weed control for lawns.

Emergence

Emergence refers to the stage of weed growth at which weed killer is applied. Pre-emergent weed killers, sometimes labeled as “weed preventers,” target and kill the germinating (sprouting) seedlings of weeds before they emerge from the soil and become visible. This makes them the best herbicide to care for established lawns and flower beds. Although it is safe around established plants, users should not apply pre-emergent where they will be planting “good” seeds for desirable plants.

Pre-emergent herbicides are generally applied before signs of weeds are visible. They will form a chemical barrier in the top layer of soil to stop the growth of seedlings underground.

Post-emergent weed killers, also known as herbicides, are used to control existing weeds that have already emerged from the soil. Apply them to the leaves and stems of visible weeds in garden beds or in driveway and sidewalk cracks. They kill weeds by either destroying the foliage or stems, or traveling down to the roots and killing the entire root system.

Weed Type

There are three types of weeds: annual, perennial, and biennial. Annual weeds live for a single season and then die with the arrival of winter, spreading their seeds to take root and grow the next year. Pre-emergent weed killers, which stop the seeds from germinating, are often the best solution for this type of weed.

Perennial weeds have root systems that store nutrients during cold seasons, which they use to grow in the spring. Biennial weeds have a 2-year growing season; the first year they grow and the second year they produce seeds before dying. Both perennial and biennial weeds are easier to kill in the late summer or fall, just before they go into their dormant stage. Liquid weed-killer sprays are the most effective option for perennial and biennial weeds.

Longevity

Some weed killers degrade in soil within a few days to weeks. While they require more frequent reapplication to keep weeds at bay, they allow users to replant the area sooner without risking damage to new plants. This makes them a better option for use in flower or vegetable gardens that are soon to be planted, as well as in places where weed preventers are less effective, like gaps between paver stones in the yard.

Longer-lasting weed killers stay in the soil and keep new weeds from growing in the application area for months or even a year after application. They’re a good option for lawns or gardens requiring lasting weed control, but they can also inhibit the germination of new plants in the area. Users should avoid applying these weed killers to areas where they plan to add new crops in the near future.

Comparison of Recommended Weed Killers in 2023

Brand	Product	Key Features & Benefits	Active Ingredients	Usage Instructions	Safety	Price Range	User Reviews
Doctor Kirchner Natural Weed & Grass Killer	Eco-friendly, non-toxic formula	Vinegar-based formula	Vinegar, sea salt, soap	Spray directly on weeds	Safe for humans, pets, and the environment	$20 – $30	Positive reviews praising its effectiveness
Southern Ag Amine 2,4-D WEED KILLER	Selective herbicide for broadleaf weed control	2,4-D Amine	Mix with water and apply using a sprayer	Follow safety instructions on the label	$15 – $25	Mixed reviews regarding its efficacy	Effective for controlling broadleaf weeds
Calyptus 45% Pure Super Concentrated Vinegar	Strong and concentrated vinegar solution	45% acetic acid concentration	Dilute with water and spray on weeds	Use caution to avoid contact with skin and eyes	$10 – $15	Positive reviews for its potency	A powerful vinegar-based option for weed removal
Ortho Weed B Gon Chickweed	Specifically targets chickweed and other common weeds	Triclopyr	Ready-to-use spray bottle for easy application	Read and follow label instructions carefully	$8 – $12	Mixed reviews, some users found it effective	Designed for chickweed control in lawns
Preen 2164174 Garden Weed Preventer	Prevents weed seeds from germinating	Trifluralin	Apply before weed seeds germinate, then water it in	Keep away from children and pets	$15 – $20	Positive reviews highlighting its preventive properties	Helps to prevent weed growth in gardens
Bonide Captain Jack’s Deadweed Brew Concentrate	Organic and natural weed killer	Spinosad	Mix with water and apply using a sprayer	Environmentally friendly, safe for beneficial insects	$18 – $25	Positive reviews for its effectiveness	An organic option for controlling weeds
Ortho WeedClear Lawn Weed Killer	Kills over 200 types of weeds without harming the lawn	2,4-D, dicamba, MCPP-p	Attach to a garden hose and spray evenly on the lawn	Take precautions to prevent overspray	$25 – $35	Mixed reviews, effectiveness varied for different weeds	Targets a wide range of weeds without damaging the lawn
Fertilome 8 Oz Over The Top Grass Killer	Eliminates grassy weeds without harming desired plants	Sethoxydim	Mix with water and apply to grassy weeds	Avoid spraying on desired plants	$12 – $18	Positive reviews for its selective grassy weed control	Designed for controlling grassy weeds in gardens and landscapes
Green Gobbler 20% Vinegar Weed & Grass Killer	Powerful vinegar-based solution for weed control	20% acetic acid concentration	Apply undiluted or dilute as needed, then spray on weeds	Use caution when handling the concentrated solution	$15 – $20	Positive reviews for its fast-acting properties	A strong vinegar-based option for weed eradication

How We Tested the Best Weed Killers

Retailers offer a broad selection of chemical, natural, and organic weed killers, but many herbicides are linked to such unintended consequences as toxicity to nontargeted plants and animals, water pollution, and human health risks. We recommend avoiding applications of most synthetic chemicals during routine maintenance—after researching 43 popular lawn and garden herbicides, we selected and tested seven low-toxicity weed killers. We were confident that they would prove to be highly effective when used as directed and safer for regular use based on their human and environmental impacts.

We timed the application of weed killers to avoid inclement weather and tested each on a minimum of 100 square feet, according to the instructions on the labels. All liquid products were applied using a backpack sprayer, or the applicator included with the product when provided, with the spray nozzle adjusted to a coarse pattern to avoid spray drift. We inspected application areas 2, 4, 8, 18, and 24 hours after spraying and noted the patterns of dieback. Then we waited 7 days and began inspecting daily for signs of regrowth.

With each of the weed killers we tested, dieback occurred within 3 days or less of the initial treatment, with no signs of regrowth for 2 weeks or more. When regrowth of perennial or woody-stemmed weeds did occur, it was significantly diminished compared to the pretreatment appearance. Secondary applications of the same products on regrowth in each area led to similar dieback patterns along with even slower, less vigorous regrowth.

What Are the Benefits of a Weed Killer?

The number one benefit of using a weed killer is its ease of use compared to the traditional way of eliminating weed. The act of physically removing weed is a very strenuous task. The traditional way requires you to get down on both knees and get your hands dirty, whereas a weed killer provides you with an easy-to-apply chemical that eliminates weed and kills any unwanted vegetation.

There will be unavoidable instances when you will unintentionally spray some herbicide on your desirable vegetation. In shopping for a weed killer, be sure to account for this. With today’s technological advancement, you can have a worry-free process of eliminating weed even with desirable vegetation nearby. In all honesty, this is one of the concerns of those who are quite skeptical about using weed killers. Weeds grow wherever they like. It would be so unlucky for you if you have weeds growing out beside your vegetation. If this is the case, you don’t have to worry much because the best weed killer can address this issue.

The most obvious benefit of weed killers is that it targets the root stopping any future weed growth. Some weed killers offer a long-term impact of a few months up to 1 year. The longer the impact, the better. If you are planting crops, you can focus more on planting them rather than eliminating the weeds surrounding them.

With weed killers, you can easily enjoy an aesthetically pleasing lawn without any worry that weeds may pop up anytime. You no longer have to constantly check if there are growing weeds in your backyard because, with herbicides, you can eliminate this chore without sacrificing greater crop yield.

Lastly, a weed killer opens doors to so many economic benefits, especially for farmers. When herbicides cut weeds, it decreases the weed control cost by a lot. In addition, a struggling economy will find that the use of weed killers can boost economic status.

How does a weed killer work?

Herbicides kill weeds by inhibiting root and shoot development or affecting foliage. Usually, pre-emergent herbicides work on newly germinated weed seeds underground to stop the normal development of root systems or prevent the plant from sending up new shoots. Post-emergent herbicides attack existing weeds.

Some herbicides are non-selective, which means they kill all plants they encounter. (Round-Up, a glyphosate-based herbicide, is a widely available type of non-selective weed killer.) Most gardeners prefer selective weed killers, which affect only the growth of targeted species. They are most used for broadleaf weed control.^[1]How weedkillers work

How long can you expect a weed killer to remain effective?

This varies by brand and concentration. Rainproof resistance is a key spec since you know a little rain shouldn’t wash away the herbicide. Using pre- and post-emergent treatments is the best way to get a handle on year-round weed control, as you prevent weeds from starting and taking care of those present, so their seeds don’t persist.^[2]How Long Does Weed Killer Last In The Soil

How do weed killers work?

Generally, weed killers are herbicides that interfere with weed growth by either destroying their root formation or restricting the growth and development of their cells, causing them to eventually die.

Are weed killers dangerous around pets?

It depends on the weed killer. Some aren’t safe for households with pets, while others are safe once they’re dry. The safest option is a weed killer with an organic formula.^[3]Is Weed Killer Safe for Pets?

How long does it take for weed killers to work?

Typical weed killers will take anywhere from two to six weeks to fully kill the root of a plant. Certain types of herbicides will produce faster results, but these herbicides kill the flowering part of the plant and not its root system.^[4]How Long Does It Take Weed Killer to Work?

What’s the best weed killer for driveways?

Though it depends on the type of weeds, the best weed killer for driveways will eliminate existing plants and prevent new growth from expanding driveway cracks. For this, use of both a pre-emergent and post-emergent weed killer would be helpful.

Are weed killers toxic to people and animals?

Yes, some weed killers can be toxic to people and animals. Recent studies, however, show that even toxic weed killers can be safe around people and pets if the directions are followed closely and the product is used sparingly.

Are natural weed killers effective?

Natural weed killers are effective at killing young, tender weeds outright. Since perennial weeds have established root systems, they will likely grow back after being defoliated with a natural weed killer. One or more follow-up treatments on regrowth may be necessary to kill the toughest weeds.^[5]Do Organic Herbicides Work?

What kills weeds permanently?

The best bet for permanently killing weeds is pulling them out of the ground from the root.^[6]Top Ways to Kill Weeds Permanently in Your Garden

Can I use vinegar as a weed killer?

Yes, vinegar can be used as a weed killer. Some commercial weed killers use concentrated vinegar as a natural alternative to synthetic chemicals.^[7]Make Your Own Weed Killer With Vinegar and Dish Soap

What herbicide do farmers use?

Glyphosate—known by many trade names, including Roundup—has been the most widely used herbicide in the United States since 2001. Crop producers can spray entire fields planted with genetically engineered, glyphosate-tolerant (GT) seed varieties, killing the weeds but not the crops.^[8]most widely used herbicide