Lockstar 500g

Lockstar is a cutting-edge pre-emergent granular herbicide formulated for total weed control on non-crop land. Featuring a dual-active combination of diflufenican (360g/kg) and iodosulfuron-methyl-sodium (10g/kg), Lockstar provides broad-spectrum control of grasses and broadleaf weeds with residual action lasting up to 4 months.

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full description

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

technical information

Product Name | Lockstar

Pack Size | 500g

Active Ingredients | Diflufenican 360g/kg, Iodosulfuron-methyl-sodium 10g/kg

Application Methods | Knapsack Sprayer, Boom Sprayer

Knapsack Sprayer Rate | 12.5g per 10L water (covers 500m²)

Boom Sprayer Rate | 500g per hectare in 300–500L water (covers 1 hectare)

Coverage per Pack | 10,000m² (1 hectare)

Residual Activity | Up to 4 months

MAPP Number | 19101