The 10 best lawn herbicides of 2022

Green Gobbler 20% Vinegar Weed & Grass Killer

Green Gobbler 20% Vinegar Weed & Grass Killer

Eliminate any weed in just a matter of hours. Expect complete desiccation in less than 24 hours. Green Gobbler contains 20% acetic acid. Use crabgrass, dandelions, weeds, white clover, moss, etc.
Perfect for residential, commercial, industrial, and agricultural use. Apply where weeds and grasses are not desired. Use driveways, sidewalks, concrete, mulch beds, pavers, flower beds, parking lots, farmlands, barns, etc. Ready to use right out of the container.
Tenacity Turf Herbicide

Tenacity Turf Herbicide

Tenacity is a systemic pre-and post-emergence herbicide for the selective contact and residual control of weeds in turfgrasses.
When applied as a pre-emergent, weeds absorb Tenacity during emergence from the soil.
Southern Ag Amine 2,4-D WEED KILLER

Southern Ag Amine 2,4-D WEED KILLER

Selective Broadleaf Weed Control
For use in pastures & rangeland, lawns, golf courses, cemeteries, parks,& similar ornamental turf.
Ortho Weed B Gon Chickweed

Ortho Weed B Gon Chickweed

Best to apply when weeds are actively growing. Rainproof 6 hours after application. Spray when the temperature is below 90 degrees, and the air is calm to avoid drifting to desirable plants.
Spectracide 96451 HG-96451 Weed & Grass Killer Concentrate2

Spectracide 96451 HG-96451 Weed & Grass Killer Concentrate2

Kills weeds and grasses: Use on driveways and walkways and around fences, trees, flower beds, shrubs, and other areas in your yard.
Kills the root: Visible results as fast as 3 hours – replant new flowers, trees, and shrubs the same weekend
Rain-fast: Rainfall or watering 15 minutes after application will not wash away effectiveness
Concentrate: Mix and apply with a tank sprayer – Spray to cover the leaves of the target vegetation completely
BASF Drive XLR8 Crabgrass Herbicide

Dimension 2EW Dithiopyr Pre-Emergent Herbicide

Drive XLR8 herbicide is the best crabgrass killer on the market using the latest technology. This water-based, liquid formulation has increased control of most weeds previously controlled by Drive 75 DF and Quinclorac 75 DF.
Celcius WG Herbicide 6666194

Celcius WG Herbicide 6666194

CELSIUS WG herbicide is a post-emergence herbicide applied to the foliage. It contains three active ingredients and provides broad-spectrum weed control. This product is suitable for residential lawns, commercial lawns, golf courses, sports fields, parks, camping grounds, leisure areas, residential properties, roadsides, school grounds, cemeteries, and turf farms, to control annual and perennial broad-leaved in a warm environment. Grasses and grasses.
RM43 43-Percent Glyphosate Plus Weed Preventer Total Vegetation Control

RM43 43-Percent Glyphosate Plus Weed Preventer Total Vegetation Control

Kills weeds and prevents weeds for up to 1 year
Treats 17,297 square feet
Ideal for fence rows, gravel paths, sidewalks, driveways, parking areas, and around farm buildings and barns
Apply to locations only where no vegetation is desired
It can be used for total vegetation control (bare ground) or spot control of brush, vines, and weeds

  The so-called lawn herbicide refers to a particular herbicide used to eliminate or control the growth of weeds in the lawn and make them selectively die. It can prevent and control lawn weeds and ensure the property is beautiful without harming the lawn. High selectivity is the fundamental difference between it and general herbicides. The principle of its action is generally to disturb and disrupt the hormone balance in plants, block a particular chain of photosynthesis, inhibit its respiration, etc., to cause weeds to become physiologically unbalanced and gradually die.

  Classification of lawn herbicides

  1. Classified by nature of action:

  •   (1). Bactericidal herbicides: kill all kinds of weeds and crops indiscriminately. These herbicides are called biocidal, such as paraquat, glyphosate, and so on.
  •   (2) Selective herbicides: Some herbicides can kill some weeds but are ineffective for other weeds. They are safe for some turfgrass but are harmful to other turfgrass. This is called selective. Herbicides with this characteristic are called selective herbicides.

  2. Classified by mode of action:

  •   (1) Systemic herbicides: some herbicides can be absorbed by weed roots, stems, and leaves separately or at the same time and transported to various parts of the plant body through the transport tissue, destroying its internal structure and physiological balance, resulting in Plant death is called systemic, and herbicides with this characteristic are called systemic herbicides.
  •   (2) Contact herbicides: After spraying on the surface of weed stems and leaves, some herbicides can kill the cells and tissues of that part. They can only kill the part of the plant tissues directly in contact with the drug, not systemic. Conductive herbicides with this characteristic are called contact herbicides.

  3. Classified according to spraying objects:

  •   (1) Soil treatment agent: spray the herbicide on the surface of the soil or mix the herbicide into the ground to a certain depth through combining operations to establish a herbicide sealing layer to kill the germinating weeds.
  •   (2) Stem and leaf treatment agent: Dilute the herbicide in a certain amount of water or other inert fillers, spray the weed seedlings, and use the absorption and conduction of the weed stems and leaves to eliminate weeds. Stem and leaf treatment mainly uses the physiological and biochemical selectivity of herbicides to achieve the purpose of weed control.

  4. Classified by application time:

  •   (1) Post-emergence sealing treatment agent: refers to the sealing treatment of the soil after the emergence of turfgrass, through the absorption of weed sprouts and sprouts to kill the weeds that are about to be unearthed and just unearthed, such as turfgrass, Cheng Ping seal Wait.
  •   (2) Pre-seedling treatment agent after sowing: Soil treatment is carried out before the emergence of turfgrass after planting. This method is mainly used for weed sprouts and young leaves to absorb the herbicide conducted to the growth point, which is safe for turfgrass sprouts.
  •   (3) Post-emergence treatment agent: refers to spraying the herbicide directly on the weed plant after the weed emerges. The post-emergence herbicide is generally a herbicide that is absorbed by the stems and leaves and can be transmitted to other parts of the plant, such as grass Hejing, Caokuojing, Nuanpingjing, etc.

  Principles of Weeding

  1. Inhibit photosynthesis of plants. Photosynthesis is when green plants use sunlight energy to synthesize carbon dioxide and water they have absorbed into organic matter and release oxygen. Herbicides interfere with the average progress of plant photosynthesis, thereby destroying the normal photosynthesis of plants and causing plant death. Such as Yijiqing, He Chuying, and so on.

  2. Inhibit plant amino acid biosynthesis. For example, glyphosate mainly inhibits the metabolism and biosynthesis process of weed meristems, the growth of plants is inhibited, and eventually, they die. Sulfonylurea herbicides inhibit acetolactate synthase, which leads to the hindrance of protein synthesis and the inhibition of plant growth and death. Such as: Caohejing, Pu Jujing, Hekuojing and so on.

  3. Interference with endogenous hormones. Hormones regulate the growth, differentiation, flowering, and maturation of plants. Some herbicides can act on endogenous plant hormones to inhibit a wide range of physiological and biochemical processes in plants, leading to plant death. Such as broad grass net, grass net, and so on.

  4. Inhibit cell division. Cells can increase, which is the basic unit of the structure and function of biological systems. Herbicides inhibit plant cell division, leading to plant death, such as Helic.

  5. Inhibit the respiration of plants. Some herbicides can penetrate the inner membrane of plant cell mitochondria, and block the electron transmission of the plant’s respiratory system, thereby destroying the plant’s respiratory system, leading to the loss of plant respiratory function and the gradual death of the plant. Such as: Matangjing, Mieshajing, etc.

  Lawn herbicide difference

  Lawn herbicides refer to professional herbicides used to prevent and control weeds in different types of lawns. Due to their unique safety for properties and the selectivity of weeding, they are different from common herbicides.

  1. Lawn herbicides must be selective herbicides. Only highly selective herbicides can kill weeds while ensuring the safety of turfgrass.

  2. Lawn herbicides are mainly systemic conductive herbicides. Due to the interactive growth of weeds and lawns, it is difficult for contact herbicides to contact the weeds and thus affect the weed-killing effect fully. Only systemic conductive herbicides can transmit the agent to the whole weed and roots, thereby removing the origins of the weeds.

  3. Lawn herbicides are mainly stemmed and leaf treatments. For Changping lawn, it is difficult for the soil treatment agent to reach the soil, it is difficult to contact the buds of weeds, and it is impossible to get a better weed-killing effect. Only the stem and leaf treatment agent can directly contact the weed stems and leaves to obtain a better weed-killing result.

  4. It has a better effect when combined with synergists. Due to the diversity of lawn weeds and the high similarity between weeds and herbal morphology, selecting herbicides is facing severe challenges. The addition of special synergistic additives can strengthen the control of weeds and use the lowest possible dose of herbicides to achieve the most excellent weeding effect and ensure the safety of turfgrass to the greatest extent.

  5. Specific safety additives must be added. Throughout the growth period of the lawn, weeds occur frequently, and there are many kinds of weeds. Frequent use of lawn herbicides to control weeds significantly impacts lawn grasses. Lawn herbicides must be added with specific safety additives to ensure the safety of lawn grasses.

  Correct use of lawn herbicides

  There are two ways to use herbicides, stem and leaf treatment and soil treatment:

  1. Stem and leaf treatment: The method of spraying the herbicide directly on the weed stems and leaves is called stem and leaf treatment. This method is generally carried out after the weeds emerge.

  2. Soil treatment: Soil treatment means spraying, spraying, pouring, watering, dusting, or contaminated soil on the herbicide to the surface of the ground or in the soil to form a certain thickness of the soil layer to contact weeds Seeds, sprouts, seedlings, and other parts are absorbed to kill weeds. Such as the lawn grows, Cheng Ping seals, and so on.

  The use time of herbicides is divided into three periods:

  1. If there is no turfgrass growth before sowing, use herbicides to treat the weeds with stems, leaves, or soil to eliminate the weeds before preparing the ground for sowing or transplanting the lawn.

  2. After turf grass is sowed, seal the soil with herbicides, and treat the ground before seedling. Post-sowing and pre-emergence treatment, also known as a pre-emergence treatment, uses herbicides before the emergence of lawn seeds after sowing. This period is relatively short, only a few days. It should be strictly controlled, and herbicides should be used before the seedlings according to the situation. Soil treatment after sowing and pre-emergence has a better control effect on weeds. Still, if the pesticide is not applied in time, it will affect the emergence of seedlings and produce phytotoxicity. Using herbicides at this stage requires high technology and is generally not recommended.

  3. It is used in the growing season of turfgrass. Generally, selective herbicides are used to spray stems and leaves to kill weeds, called stem and leaf treatment.

  Factors affecting the efficacy of lawn herbicides:

  1. Soil factors (significant influence on the sealing agent):

  (1) Soil texture: Soil texture affects the soil’s adsorption and leaching of herbicides. Generally, clays with high organic matter content adsorb more herbicides, while clays with low organic matter or sandy soils adsorb fewer herbicides. Great solubility. The weeding effect and phytotoxicity effect on the lawn decrease in the order of sand, loam, and clay.

  (2) Organic matter content: Organic matter has an adsorption effect, and there are many microorganisms in organic matter. The rapid reproduction of certain microorganisms has the function of decomposing and reducing the efficacy of the medicine. Therefore, when soil organic matter and microorganisms are high, the amount of herbicide should be increased.

  (3) Soil moisture content: Most herbicides increase their efficacy with the increase of soil moisture content and even play a decisive role in the effect of herbicides. However, excessive rainfall after application will cause herbicide leaching and infiltration, causing phytotoxicity.

  2. Meteorological factors:

  (1) Wind: There is wind during the application, and when the wind speed exceeds 8-10 m/s, spray application, the efficacy of the herbicide can be reduced by about half. The best wind speed for medication is below four m/s.

  (2) Rain: Rainfall after application under drought conditions (10-15 mm is best), which is conducive to the effectiveness of soil treatment herbicides. The reason is that the rain can spread and move the herbicide, and at the same time, it can also make the weeds increase and absorb the herbicide to improve the effect.

  (3) Humidity: The herbicide for stem and leaf treatment is applied when the air humidity is relatively high, which can make the herbicide stay on the leaf surface of the weed for a longer time, and help the leaf surface stomata to open, thereby absorbing a large amount of herbicide. , Improve the effect of weeding. Soil treatment herbicides are absorbed and transported upward with a large amount of water to inhibit photosynthesis and improve the impact of herbicides. The optimal humidity for medication is above 65%.

  (4) Drought: In the case of drought, low atmospheric temperature and soil moisture are not conducive to the root system’s absorption of herbicides in the soil, and it isn’t easy to exert its effect. Herbicides are applied to the leaf surface. The drought not only prevents the spread of the medicine on the leaf surface but also inhibits the stomata, lenticel opening, and absorption of the weed leaf surface, restricts physiological activities, slows growth, and absorbs the herbicide. It will also weaken, and the effect of herbicides will not be good.

  (5) Temperature: The temperature is directly proportional to the herbicide effect. When the temperature is high, weeds will be absorbed and transported to the site of action quickly, and the weed-killing impact will be good. The air and soil temperature are high, and the effect of the herbicide is noticeable, especially the herbicide for stem and leaf treatment is the most obvious. On the contrary, if the temperature is low, the effect of the herbicide is poor. Ruscio Kuo Jing has a good weeding effect when the average daily temperature is stable above 10 degrees, and the best application temperature is between 15-35 degrees.

  (6) Sunshine: The more robust the sun, the better the weeds will absorb and conduct the herbicide, but too strong light will affect the time the liquid medicine stays on the weeds, which in turn affects the time to absorb the treatment, so in the hot summer, It is best to avoid the high-temperature period at noon for better effect.

  3. The selection factors of herbicides: various herbicides have their weed-killing spectrum, and different lawn herbicides have other control targets.

  Main points of the application of lawn herbicides

  1. Accurate selection of herbicides: Correctly select the appropriate herbicide species according to the types, varieties of turfgrass, and the growth of weeds.

  (1) First of all, we must correctly understand the species and growth of the lawn. Different lawns correspond to other lawn herbicides, and various growth periods of grounds correspond to different lawn herbicides. Herbicides should be used on healthy turfgrass. Please do not use them during diseased turfgrass. Use caution when turf grows poorly or during dormant periods because lawns are more sensitive to herbicides during diseased, poorly developed, or inactive periods than during regular growth periods. It is much higher, cannot detoxify normally, and is prone to phytotoxicity.

  (2) It is necessary to know the type, growth period, and occurrence degree of weeds to be controlled before applying the medicine. Each herbicide has its unique weed-killing spectrum, and the herbicide can be used according to the grass. Otherwise, the weeding effect will not be achieved. Weeding should be weeded early and small. If the grass age is too old, the woody degree of weeds is too high to get a better weeding effect. According to the degree of weed occurrence, weeds are used to divide the weeds in the area to prevent and eliminate the main weed species. The individual weeds with a small number can be manually removed for comprehensive control.

  (3) Choose a compound or use different herbicides in rotation to avoid weed resistance.

  2. Strictly controlling the dosage of herbicides is one of the measures to improve the efficacy and prevent phytotoxicity. The recommended dosage of each herbicide is the result of years of practice and various experiments. The dosage must not be increased or reduced arbitrarily to ensure the herbicide effect without causing phytotoxicity. Otherwise, safe herbicides will also cause phytotoxicity. Herbicides should be used with caution when lawns are in the dormant period, weak growth period, and pest damage period. Considering the lower limit of use, you can also reduce the use concentration by 50% and use it twice a day apart. The effect is better, and the safety is higher.

  3. Insist on applying the pesticide at the best time: If the spraying time is not well controlled, the drug’s efficacy will be reduced, and even phytotoxicity will occur.

  4. Pay attention to the temperature during application: Temperature is an essential factor affecting weeds’ growth and the efficacy of herbicides. Generally, when the temperature is higher, it is conducive to the effectiveness of the herbicide.

  5. Ensure proper soil moisture: Whether it is soil treatment or stem and leaf treatment, soil moisture is an essential factor affecting the efficacy of lawn herbicides. “Dry roots grow, wet shoots” soil moisture is high, the weeds proliferate, the stomata are open, the leaves are less waxy, the tissue is delicate, and it is easy to absorb the medicine; when the drought occurs, the roots of the weeds begin to grow deep in search for water absorption, The root system is developed, the above-ground part stops growing, the stomata of the leaves are closed, the wax is thickened, it is difficult to attach the medicine, the absorption of the drug is negligible, and the medicine effect is poor. Applying the pesticide in time on a sunny day after rain or properly watering the day before spraying will help the impact of the drug.

  6. Pay attention to the nature of the soil: When using the sealing agent, the earth’s heart significantly influences the herbicide’s efficacy. The soil with high organic matter content has a good aggregate structure, large adsorption capacity for the herbicide, a large number of soil microorganisms, and vigorous activity. It is easy to be degraded and is safe for lawns at the exact dosage, but the effect of weeding is poor, so it is necessary to increase the dosage appropriately.

  7. The use of a slight fog point, fan-shaped fog cone type motorized sprayer is conducive to the dispersion and absorption of the liquid on the stems and leaves of the plant, increasing the plant’s absorption of the effective ingredients of the herbicide, to achieve a better weeding effect. The best spray diameter of the post-emergence herbicide is 250-400um, and the density of the droplets is 30-40/cm2 (systemic) and 50-70/cm2 (contact).

  8. It is difficult to spray the weeds evenly when the wind is strong, and it is best to spread when there is no wind. The wind speed should not be greater than four m/s during medication.

  Herbicide occurrence and remediation

  Analysis of several situations in which herbicides cause phytotoxicity:

  1. Use the medicine during the sensitive period of the lawn. (Drugs should be used with caution during disease occurrence and dormancy periods)

  2. Increase the use concentration at will. (Can not arbitrarily exceed the use concentration range marked in the product manual)

  3. Improper use. (For example, the pre-emergence can not be used in the post-emergence, and the ping grass can not be used in the young ping grass)

  4. The medication interval is too close. (Different herbicides have their safe use intervals)

  5. Administer the medicine at too high a temperature. (The temperature exceeds 38 degrees, and the medication must be used with caution)

  6. Blindly mix and use herbicides. (Some herbicides can only be used singly, not mixed randomly)

  7. Use incorrect spray machinery. (High-pressure spray guns, oversized nozzles, etc. will increase the risk of phytotoxicity)

  How to effectively prevent the occurrence of phytotoxicity:

  •   1. Use unique products for lawn herbicides and use them in strict accordance with the instructions;
  •   2. Do not use herbicides for lawn grass seven days after emergence; do not use herbicides that prevent gramineous weeds before two leaves and one heart.
  •   3. In summer, especially under the conditions of high temperature and high humidity, for sandy soil (golf course grass preparation area) and barren soil 20 days before the emergence of the lawn, use the grass herbicides Matangjing, Herik, etc., for sandy loam and sandy soil. , Do not close the weeding before budding on barren land.
  •   4. In summer, cold-land turfgrass enters a hot dormancy period. When the disease is severe, it is strictly forbidden to use herbicides for controlling gramineous weeds; normal and healthy turf is best to avoid the noon high-temperature period, and it is best to cooperate with fungicides at this stage Use; You Ping must be more cautious in controlling gramineous weeds.
  •   5. The herbicide can not be sprayed immediately after trimming the lawn, which will cause two-way damage to the property. Wait for the wound to heal for some time before using the herbicide. Generally speaking, the fastest safe interval is 24 hours.
  •   6. Herbicides and organophosphorus pesticides must be used more than seven days apart, and it is strictly forbidden to use them simultaneously.

  What herbicide kills weeds but not grass?

  Several chemical herbicides can be used to kill weeds in a lawn without killing grass. Some examples include sulfentrazone, triclopyr, and edoxaban.

  When should you spray herbicide on the lawn?

  When is the best time to apply a broadleaf herbicide to the lawn? Fall (mid-September to early November) is the best time to control perennial broadleaf weeds in the yard with broadleaf herbicides.

  What is the most effective herbicide?

  For several reasons, glyphosate is the most widely used postemergence herbicide in landscape plants. First and foremost, it is effective. Glyphosate is a systemic (translocated) herbicide that moves from the treated foliage to other plant parts, including the roots.

  Herbicide remedies

  The rescue method when herbicide damage occurs on the lawn: within 3-5 days of using the herbicide, use brassinolide products (or gibberellin) + root duo + Allan or potassium dihydrogen phosphate (this formula also can alleviate the phytotoxicity caused by overuse of insecticides and fungicides), once every 5-7 days, 2-3 times in a row, it can completely detoxify. Under normal circumstances, the apparent phytotoxicity can be observed only after seven days of using the herbicide. If the phytotoxicity is not very serious, the method mentioned above can also significantly alleviate the phytotoxicity. When herbicide damage occurs on the golf course, the spraying and detoxification should be accompanied by sanding to relieve faster. Under normal circumstances, new tillers can sprout in about 10-15 days.

Joe Jackson

Joe Jackson

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