Diamond Horse Tail Killer is a powerful professional-use weedkiller formulated to tackle one of the toughest and most persistent invasive weeds in the UK – Mares Tail (Equisetum arvense), also known as Horsetail. This dual-action herbicide combines 160g/L 2,4-D with 240g/L glyphosate to deliver deep systemic control, making it one of the most effective solutions on the market for managing invasive weeds in hard surface areas and amenity settings.
Approved under MAPP No. 19846, Diamond Horse Tail Killer is suitable for use with a boom sprayer, delivering long-lasting results across large treatment areas. This advanced herbicide is also ideal for tackling other problematic perennial weeds, including Japanese Knotweed, Ragwort, Bracken, Thistles, Nettles, and Dock, making it a must-have for any professional involved in landscape management or industrial weed control.
Features & Benefits
Dual-active formulation – combines Glyphosate and 2,4-D for enhanced weed penetration
Specifically targets Horsetail & Mares Tail – one of the most difficult weeds to control
Effective against a wide spectrum of invasive and perennial weeds
Ideal for hard surfaces – pavements, roadsides, fence lines, industrial sites
Suitable for professional boom sprayer application
Safe for use around fruit trees – controlled and precise application
Designed for use by professionals – councils, landscapers, and maintenance teams
Application & Coverage
Application Method Rate Coverage per Pack
Boom Sprayer 3–5L per hectare in 200L of water 1L pack = 2,000m²
5L pack = 10,000m²
Note: Always apply when weeds are actively growing and in full leaf (spring to early autumn). Avoid spraying in frost or during heavy rainfall.
Type of Weed Control
Systemic, non-selective herbicide
Dual mode of action ensures deep root kill, reducing regrowth
Weeds Controlled
Mares Tail / Horsetail (Equisetum arvense)
Japanese Knotweed
Bindweed
Broad-leaved Dock
Couch Grass
Bracken
Ragwort
Thistle
Nettles
Gorse
Pavement Weeds
General Annual & Perennial Weeds
Sycamore saplings
Rhododendron
Active Ingredients
160g/L 2,4-D
240g/L Glyphosate
This combination allows enhanced leaf and stem penetration, particularly for thick-walled, deep-rooted weeds like Mares Tail.
Area of Use
Hard Surfaces
Pavements, paths, roadways
Around fruit trees
Amenity and industrial zones
Permeable surfaces
Period of Use
Spring, Summer, and Autumn (when weed growth is active)
Professional Use Only – UK Legal Requirements
Diamond Horse Tail Killer is a professional-use herbicide and must only be applied by certified individuals holding valid PA1 and PA2/PA6 qualifications. These certifications are required by UK legislation for the safe and legal use of professional pesticides and herbicides.
All applications must adhere to product label guidelines, and appropriate protective equipment (PPE) should be worn. Avoid drift to non-target areas, especially near desirable plants and watercourses. Observe LERAP Category B restrictions when spraying near water.
Why Order from Green-tech?
Trusted supplier to local authorities, landscapers & estate managers
Wide selection of professional herbicides and equipment
Expert support for application and product selection
Fast, reliable UK delivery
Competitive pricing with bulk order options available

Attribute Details
Product Name Diamond Horse Tail Killer
Pack Sizes Available 1L (covers 2,000m²), 5L (covers 10,000m²)
Active Ingredients 160g/L 2,4-D + 240g/L glyphosate
Application Method Boom Sprayer
Boom Sprayer Rate 3–5L per hectare in 200L of water
Weeds Controlled Mares Tail, Horsetail, Dock, Brambles, Knotweed, Ragwort, etc.
Control Type Systemic, non-selective
Area of Use Hard surfaces, around fruit trees, amenity and industrial land
Period of Use Spring, Summer, Autumn
MAPP No. 19846
LERAP Category B