Grassland and Maize Agronomy Update – February 2018


Grassland & Maize newsletter

Welcome to the Grassland and Maize Agronomy Update from DowDuPont. With the merger of Dow AgroSciences, DuPont Crop Protection and DuPont Pioneer, this newsletter now covers maize as well as all things grassland.

These regular technical notes are a seasonal commentary to help those interested in improving grassland and forage productivity on dairy, beef, sheep and equestrian enterprises.

You can claim two CPD points for subscribing to this email update.


  • Weed control in new sown leys
  • Chickweed
  • Aminopyralid stewardship training
  • Maize hybrids
  • Low drift technology
  • Spray packaging – USP’s
  • Grassland BASIS courses
  • FAQ’S
  • Shows Calendar

Weed control in new sown leys

Good quality grazed grassland is still the cheapest feed source for livestock. Reseeding to keep pastures in peak condition is an important part of grassland management, but it is expensive, so it is important that it is done correctly. In new sown leys the key target weeds are annual species such as chickweed, redshank and fat hen, plus seedling docks and thistles.

There are few herbicides approved for use on new sown leys, so Leystar™ and Envy™, new last year, have quickly found favour for use in newly established grassland. For best results apply when weeds are small and actively growing. Spraying early in a sward’s life will ensure a clean start, allowing grass to establish quickly without competition from weeds. It is more economical and effective to treat weeds at this stage than wait for them to establish and treat when they are bigger.

chickweed in grasslandChickweed

Chickweed can quickly grow and smother a young ley. It can also take hold in gappy established grassland.

Leystar and Envy are both effective on chickweed in new sown leys.

In established grassland and where it is the main weed use Envy. If other weeds are present consider DoxstarPro®, Forefront T® and the Pas·Tor Agronomy Pack® which all effectively control it.


Aminopyralid stewardship training

All Forefront T purchases need to be authorised by a trained advisor. This is a simple process using the Dow Grassland App.

If you would like to receive aminopyralid stewardship training to be able to recommend Forefront T, please contact your local representative, or contact the Technical Hotline on 0800 6898899 /



Maize hybrids

New maize hybrids from Pioneer for 2018

P7034 can be grown on all but the coldest sites, and its dent-like grain texture will improve silage quality immediately after ensiling due to faster starch digestibility.

P7932 provides an intermediate maturity option for those cultivating under film using the Samco System
Pioneer Maize Hybrid Line-Up 2018

For further information on Pioneer maize hybrids see

Low drift technology

Achieving good spray coverage is important for getting sufficient amounts of the active ingredients in the herbicides onto the leaves.

Where flat fan nozzles are used always follow the label advice on water volumes. If an operator wants to apply at a water volume of 200 L/ha, DowDuPont supports this if applied with air inclusion nozzles. See our short instructional video.




Spray packaging unique selling points (USPs)

All of DowDuPont grassland herbicides are supplied in PET (polyethylene terephthallate) based packaging. This offers operators improved ease of use and simpler washing, whilst delivering environmental benefits due to reduced weight and easier disposal.

For sprayer operators, the first obvious difference between PET and High Density Polyethylene (HDPE) packaging is the transparency of the grey shaded material, allowing the contents to be seen at a glance. The caps are ergonomically designed for ease of opening, even when wearing protective gloves. In addition, there is no foil seal which reduces the risk of spillage in the handling areas and speeds up filling.

The cylindrical shape with central opening allows easy pouring and reduces the risk of ‘glugging’.

What is not apparent to the naked eye is the smoothness of the inner surface. This means any chemical residue left in the bottle is rinsed out easily – again making life easier for sprayer operators. Finally, with cap and bottle being made of the same material, there is no need to hold separate stocks for disposal.

Grassland Product Range


BASIS courses

Considering taking BASIS? Then look at BASIS Certificate in Crop Protection (grassland and forage crops).

Its ideal for those focused on the livestock sector and enables you to give bespoke advice to farmers seeking support. Upon completion you will: advise:

  • Be aware of the different types of grassland found in the UK
  • Understand the different plant species used in grassland and their role in production
  • Explain how plants grow and develop through the season and the effects this has on feed value
  • Understand how weed problems develop in forage crop situations and the steps appropriate to control them
  • Appreciate the economic and environmental importance of grass and forage crop pest control
  • Recognize potential diseases and recommend appropriate methods of prevention, treatment and control
  • Understand pesticide safety and approve aspects specific to grassland/ livestock farm situations
  • Understand pesticide application in forage crop situations
  • Understand aspects of hand-held and small scale/local pesticide application methods.

Visit BASIS: to find out when and where the courses are being run in 2018.


Q.  What will control mouse-eared chickweed?
A.  Envy or Leystar will control mouse-eared chickweed.

Q.  When can clover be stitched in after treating a new ley with Envy or Leystar?
A.   You can establish clover three months after application of Envy or Leystar.

Show Dates

The technical team from Dow AgroSciences will be out and about at many shows and events this Spring, talking to farmers and agronomists and answering questions on how to tackle weed problems in their fields.

Catch the team at:

Feb 7th Dairy Tech Stoneleigh Park, Warwickshire
Feb 28th RNAS Spring Show Thainestone Ag Centre, Inverurie
May 10th Grassland UK Bath & West
May 16th Royal Welsh Grassland Carnbwll, Four Crosses, Powys SY22 6SN
May 17th FTMTA Grass & Muck Gurteen College, Birr
May 25th NBA Beef Expo Halls Shrewsbury Livestock Auctions Centre
May 30th NSA Scot Sheep King Arms Farm, Ballantrae

For regular updates on agronomic issues, find us on Twitter and Facebook

For further information please contact the technical Hotline on 0800 689 8899 / or go to

Use plant protection products safely. Always read the label and product information before use. For further information including warning phrases and symbols refer to label.

®™ Trademark of the Dow Chemical Company (“Dow”) or an affiliated company of DowDuPont or Pioneer.  All other brand names are trademarks of other manufacturers for which proprietary rights may exist.

DoxstarPro contains fluroxypyr and triclopyr
Envy contains fluroxypyr and florasulam
Forefront T contains aminopyralid and triclopyr
Leystar contains fluroxypyr, clopyralid and florasulam
Pas·Tor Agronomy Pack contains clopyralid, fluroxypyr and triclopyr

DowDuPont, CPC2, Capital Park, Fulbourn, Cambridge, CB21 5XE.  Tel: +44 (0) 1462 457272.

Technical Hotline: 0800 689 8899 email: |