Lockstar 500g is a residual pre-emergent herbicide for use on non-crop land. It offers up to 4 months of weed control, with a fast-dissolving granular formulation and broad-spectrum activity. MAPP 19101.
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Lockstar is a cutting-edge pre-emergent residual herbicide designed for total weed prevention on non-crop land. Powered by an innovative combination of diflufenican (360g/kg) and iodosulfuron (10g/kg), Lockstar controls a broad range of grasses and broadleaf weeds with residual action lasting up to 4 months.
This granular formulation dissolves rapidly in water and remains in suspension for at least 24 hours, ensuring consistent and even application via knapsack or boom sprayer. Lockstar is ideal for non-crop areas such as railway ballast, fence lines, pavements, yard edges, and permeable surfaces over soil.
Features & Benefits
Pre-emergent residual control – stops weeds before they emerge
Long-lasting protection – up to 4 months’ residual activity
Innovative dual-active formulation – effective resistance management
Tank mix compatible – can be combined with glyphosate or fatty acids for post-emergent knockdown
Fast-dissolving granules – stays in suspension for a full 24 hours
Professional use – ideal for councils, rail, highways, and hard surface weed prevention
Active Ingredients
Diflufenican – 360g/kg
Iodosulfuron-methyl-sodium – 10g/kg (sulfonylurea)
Application Guidance
Application Method Rate Coverage
Knapsack Sprayer 12.5g in 10L water Covers 500m²
Boom Sprayer 500g per hectare Covers 1 hectare
Water volume: 300–500L/ha
Max treatments per year: 1
Pack size: 500g = 10,000m² coverage
Apply before weed emergence for optimal residual control.
Target Weeds
Clover
Dandelion
Meadow Grass
Ribwort Plantain
Speedwell
Other annual grass and broadleaf weeds
Area of Use
Hard Surfaces (Railway Ballast Only)
Natural Surfaces Not Intended To Bear Vegetation
Permeable Surfaces Overlying Soil
Fence lines, kerb edges, yards, around substations
MAPP Number
19101
LERAP Category
Crop buffer of 5m – see authorisation for full guidance
Why Choose Lockstar from Green-tech?
Proven long-lasting weed control in a single application
Ideal for seasonal weed prevention programmes
Reduces need for multiple herbicide treatments
Compatible with other total weedkillers
Supplied in a convenient 500g contractor pack
Attribute Details
Product Name Lockstar
Pack Size 500g
Active Ingredients Diflufenican 360g/kg, Iodosulfuron 10g/kg
Application Method Knapsack or Boom Sprayer
Knapsack Rate 12.5g per 10L of water (covers 500m²)
Boom Sprayer Rate 500g per hectare in 300–500L water
Pack Coverage 10,000m² or 1 hectare
Weeds Controlled Clover, Dandelion, Meadow Grass, Speedwell, Broadleaf weeds
Residual Activity Up to 4 months
MAPP Number 19101
LERAP See product authorisation (buffer zone: 5m crop)
Application Frequency Max 1 treatment per year
