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Roundup Hub

Roundup Use

The Roundup Brand was born in 1974. Since then products based on glyphosate have become the most widely used herbicides in the world. The benign nature of the molecule to operators and the environment combined with excellence in weed control make it first choice for non-selective weed control.

Roundup Use Video (please right click to download)

Mode of Action

Once applied to the leaf uptake occurs within 1-6 hours and glyphosate moves through the phloem both downwards and upwards within 5 days. It tends to accumulate in the growing points, then evens up throughout the plant, leading to a gradual loss of green colour followed by death between one and four weeks later.

Glyphosate works at a single specific site in the Shikimic acid pathway to inhibit the production of the amino-acids phenylalanine, tryptophan and tyrosine. Amino- acids are the building blocks of protein molecules and once the biochemical pathway is blocked the synthesis of proteins is interrupted and the plant effectively starves to death. The process is temperature related and explains why treated plants take some time to die.

For more detailed information about the glyphosate mode of action see the glyphosate infomation portal

Environmentally Friendly

This metabolic pathway is present only in green plants. Higher forms of life like mammals, birds, fish and insects are dependent on plant sources to obtain these three amino-acids in their food and neither absorb nor metabolise glyphosate. This is the reason Roundup has such environmentally friendly characteristics.

No other class of commercial herbicide is known to target this site (HRAC group G).

Glyphosate Formulations

All glyphosate products are not same. While they all contain the active ingredient, glyphosate, the formulation type in which the glyphosate is carried plays a major role in performance.

Our formulation chemists have worked continually since the launch of Roundup to bring out new formualtions with improved weed control, leass restrictive conditions of use and better safety profiles under COSHH.

Modern formulations of Roundup are highly active and provide the highest levels of uptake and translocation leading to improved speed, rain fastness and efficacy.


Find out more:


Best Practice

All agrochemicals need particular weather conditions, good application technique and target weeds in a receptive condition to achieve their very best results. Factors affecting the performance of Roundup are detailed in this section to help achieve the very best results every time they are used.

Use the navigation menu on the right to go to the appropriate section.

Best Practice Information:


Stewardship Schemes

Cross compliance requirements apply to anyone who receives direct payments under Common Agricultural Policy (CAP) support schemes or receives payments under certain Rural Development schemes. Compliance with both European legal requirements, known as Statutory Management Requirements (SMRs) and with domestic legal requirements requiring land be kept in Good Agricultural and Environmental Condition (GAEC) is required and any breach may result in reductions of EU payments

Information on situations where Roundup can be used as part of Stewardship Schemes is contained in this section.

For further information in England please consult the Cross Compliance Website, in Scotland visit, in Wales visit

Stewardship Schemes Information:


Understanding Pesticide Labels

The Importance of Statutory Conditions and Fields of use Within the Law

Everyone who uses pesticides referred to as Plant Protection Products, (PPP) should abide by the Code of Practice for using plant Protection Products 2006 (COP). It has legal status and by following the advice you will be within the law. Both The Food and Environment Protection Act 1985, (FEPA) and the Health and Safety at Work Act, 1974 apply to the use of PPP.

The Importance of the Label

The COP is very specific about the need to follow the label as a whole and comply with maximum dose rates, maximum number of treatments etc. Labels now carry this statement:


Use of a PPP against the label or the approval automatically results in failure to meet the Statutory Management Requirements under EU rules for farm payments.

Fields and Conditions of Use

All approved pesticides have fields of use listed on the label. The conditions of use must be followed in order to remain within the law and are listed prominently under the product name e.g.


Products which are approved for agriculture and horticulture should not be used in Industrial and Amenity situations unless they are also listed.

The details are listed below the main heading under CROPS/SITUATIONS. It is not always obvious what these crops/situations are so it is vital to make sure you understand before you use a PPP for a situation which is not included on the label. These are all defined by CRD in the Crop hierarchy (Last revised in 2006) which can be downloaded from the CRD website

The information is also in the Code of Practice for using Plant Protection Products on p16,17 table 1.

Example of Fields and Conditions of Use: Roundup Energy label




  • Wheat, (including Durum wheat), barley, oats, combining peas, vining peas, field beans;
  • Oilseed rape, mustard, linseed;
  • Sugar beet, swedes, turnips, bulb onions, leeks;
  • All edible crops (stubble), all non-edible crops (stubble);
  • All edible and non-edible crops (destruction, before sowing/planting);
  • Grassland;
  • Apples, pears; plums, cherries, damsons;
  • Green cover on land not being used for crop production;

CRD Crop Heirarchy Definitions

Most specific crops listed are self explanatory. However there is sometimes confusion over plant-free areas.

Natural surfaces not intended to bear vegetation. Areas of soil or natural outcroppings of rock that are not intended to bear vegetation, including areas such as sterile strips around fields. May include areas to which the public have access. It does not include the land between rows of crops.

'Green cover on land not being used for crop production' comes under the agricultural/horticultural heading in the crop hierarchy and does not include industrial or amenity situations.

Areas of land with a vegetation cover that have been removed (temporarily or otherwise) from production. For example some types of set aside. Includes fields or non-crop field margins covered by natural regeneration or by a planted green cover crop that will not be harvested.

Does NOT include use in industrial crops or inter-row use within a crop (edible or non-edible).

Other Plant-free areas with industrial and amenity approval are Permeable surfaces over lying soil or hard surfaces.

Permeable surfaces overlying soil: Any man made permeable surface (excluding railway ballast), such as gravel, that overlies soil and is not intended to bear vegetation.

Hard surfaces: Any man made impermeable surface, such as concrete or asphalt and including railway ballast, that is not intended to bear vegetation.

If the situation you intend to use a PPP for is not listed on the product label, then you cannot follow label instructions and comply with the law. You may need to choose a different product which does carry the intended use.

Crop Specific Information

Detailed information is given in a further table on Maximum use rates, number of treatments & other specific restrictions.

Crops or situationsMaximum individual dose (litres product/hectare)Maximum total dose(litres product/ hectare/ crop or situation/ annumLatest time of application
Winter wheat, winter barley, winter oats, spring wheat, spring barley, spring oats, durum wheat, combining pea, field bean 3.20 3.20 7 days before harvest
All edible crops (stubbble),
all non-edible crops (stubble)
4.0 or 1.2 4.0
5 days before drilling or planting the following crop
2 days before the drilling or planting of the following crop or 24 hours before cultivation
All edible and non-edible crops (destruction, before sowing/planting) 4.0 - -
Grassland 4.8 4.8 5 days before harvest, grazing or drilling
Green cover on land not being used for crop production 4.8 4.8 24 hours before cultivating


Each line in the table represents a new situation and where more than one situation occurs for the same crop it can be sprayed once for each situation. For example in winter wheat you can apply up to 1.2l/ha of Roundup Energy post planting, but before emergence, then up to 3.2l/ha before harvest and up to 5l/ha in the autumn on the stubble.

The Maximum individual dose rate is simply the highest dose you can apply at any one time. The maximum individual dose rate will vary according to the particular use e.g you can apply Roundup Energy at up to 4.8 l/ha on grassland, 3.2l/ha pre-harvest of wheat or 1.2l/ha post planting, pre-emergence of listed crops.

A maximum number of treatments may be specified under the ‘Maximum number of treatments per year’ column for some products. We use a Maximum total dose wherever possible which allows flexibility to split into any number of treatments.

Water volumes in which the product can be applied may also be restricted. Instructions will be given on the label eg Apply in 80-250l/ha of water. In some cases this can be reduced, but the rules are complicated and often do not apply to knapsack use. (See para 4.6.4 COP).

Always read the label carefully and comply with all the label instructions.

Failure to follow label restrictions could result in prosecution.


Pesticides and Waste Regulations

 This note details how our products are classified under the Waste Framework Directive, 2008/98/EC and offers useful advice for farmers on the waste production involved in the use of our products and their obligations under the Environmental Protection, (Duty of Care) Regulations, (as amended), 1991.

Keep waste to a minimum

Choose high-load modern Roundup formulations which reduce the number of cans or bags used over standard 360 g/l formulations.

Choose products not classified as hazardous where possible.

Always use sprays from the store in rotation to avoid the need to dispose of out of date agrochemicals, which are Hazardous waste*.

Always rigorously triple rinse** containers to avoid classification as Hazardous waste*.

Some products are available in bulk containers, (IBCs). These should not be classified as waste by the farmer, but returned to us for re-use.

How to classify waste for re-cycling or disposal

All European Waste Catalogue, (EWC), categories with * are classed as Hazardous waste and come under the Hazardous Waste Regulations. Not only is Hazardous waste an average of four times more expensive to dispose of, but also farmers will only be exempt from registering as a Hazardous Waste producer if they produce less than 500kg per year in total.

Farmers should use pesticide stocks in a rotational way to avoid keeping pesticides which are no longer approved and need to be disposed of. They should rigorously empty and triple rinse all containers to keep their hazardous waste production below the 500kg threshold.

Storage of waste on farm is allowed for up to 12 months and the Landfill Directive prohibits untreated business waste being sent to Landfill. Separation and recycling of plastic and cardboard waste means the residue can still be sent to landfill. Many farmers use a national collection and recycling scheme or take their waste to a disposal site themselves. Either way under the regulations they have a Duty of Care to secure their waste, only pass it on to someone who is authorised to take it, fill in a Waste Transfer note and keep it for two years.

In order to fill in an Agricultural Waste Transfer Note, farmers must self-classify the waste according to the European Waste Catalogue, (EWC).

Uncontaminated cardboard outer boxes containing pesticide packs are classed as paper and cardboard packaging, EWC 15-01-01

All our liquid herbicides are supplied in plastic drums which should be triple-rinsed on emptying according to Best Practice and The Code of Practice for Using Plant Protection products, 2006**. They are then classed under the EU Waste Catalogue as ‘Plastic packaging’, EWC15-01-02

Roundup PowerMax is our only granular pesticide and these bags are also classed as ‘Plastic packaging’ EWC 15-01-02. They do not need to be triple-rinsed but should be ‘emptied, shaken and inspected for cleanliness.’

Un-rinsed containers and pesticide contaminated cardboard, where the pesticide is classed as Hazardous are EWC15-01-10* and if they contain unclassified product are EWC15-01-02

Pesticide concentrate or residues are classed as ‘Hazardous Waste’ ECW 02-01-08* if the product is classed as Hazardous and ECW 02-01-09 where the product is unclassified. Since the introduction of CLP the classification of products has changed. For current products with (H319) waste is hazardous only if the product comprises 20% or more of the waste material. For those classed as or with H statements H400,H410,H412 or H413 waste is hazardous where product comprises 25% or more of the waste.

Roundup pack type

Plastic waste Kg

Cardboard waste Kg

20 litre can



15 litre can



10 litre can



5 litre



Roundup Powermax bag



Cardboard outer from box of 4x5l or 2x 101 cans 



Triple rinsing procedure

1. Fill the emptied container 10 – 20% full of water
2. Replace the cap securely
3. Depending on container size shake, rotate or roll it vigorously to rinse all inside surfaces
4. Remove the cap, add the washings to the spray tank
5. Repeat steps 1 to 4 twice more, ensuring complete drainage on the last emptying.
6. Put the cap back on the container and store safely for disposal



Roundup Agriculture

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Roundup Amenity

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Knowledge Hub

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Knowledge is power when tackling Italian ryegrass

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6 facts about herbicide resistance in Italian ryegrass

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Five Reasons to resistance test black-grass and ryegrass and how to do it

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Why diversifying herbicide modes of action is crucial

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How previous seasons’ weed control can inform your approach this autumn

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Barnyard grass - young

Review herbicide options for effective weed control

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Effective control of black-grass essential before winter wheat

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Resistance drives grassweed problems

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Brome and Italian rye grass problems really grow

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Wild oat

Wild oats - identification and occurance

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Grassweed Species Categories

Patch Spraying



Patch spraying is a useful tool in the control of difficult weeds that have evaded the cultural and chemical controls used as part of an integrated management plan. It is an aggressive measure but will help as part of an overall strategy to control the weed and preserve yields longer term.


Continue Reading


Harvest Managment



A guide to the timing of Roundup for harvest management applications in OSR and cereals


Read the guide here


Grassland Reseeding


Rather than making grass leys last longer, consider reseeding to boost both yield and quality of home grown fodder. New swards produce an average of 25% more dry matter in the first year alone.

Continue Reading



Bracken Control



Bracken (Pteridium aquilinum) is widely distributed throughout the UK being by far the commonest fern. Bracken is reported to cover over 8% of the country, an area of 11,000 At 1-3% per year the rate of spread is faster than all the programs in place to control it, and it is encroaching on to grazing ground, forestry and amenity areas, reducing bio- diversity.


Continue Reading


Making the Most of Grassland Reseeding with Roundup


Reseeding is one of the most cost effective investments that can be made on a grassland farm. Deciding when to re-seed an old sward or pasture can be difficult, and in some cases may not be necessary with rejuvenation or renovation being most cost effective. Read on to find out more.

Download the booklet here


Glyphosate Stewardship


Applied correctly, glyphosate as a non-selective herbicide can deliver very high levels of weed control. As such, it has become one of farmers’ most trusted weed management tools. However, experience around the world shows that glyphosate is not invincible, weeds can develop resistance to it.

Download the booklet here



Crop advice and Expertise

Roundup News

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