Pack size


Pack coverage


Application rate


Water rate

300-500 L/ha



Formulation type



Total herbicide


360g/kg diflufenican and 10g/kg iodosulfuron-methyl-sodium, a sulfonylurea

Max number of treatments

1 per year


  • Key points
  • How to prepare and apply LockStar
  • When to apply
  • Downloads
Key points
  • A total, residual, pre-emergent herbicide
  • Contains an innovative new active ingredient
  • Controls a broad spectrum of weeds
  • Residual effect for up to four months
  • Can be tank-mixed with glyphosate or fatty acids for post-emergent control
  • Excellent tool for resistance management
  • The granules dissolve quickly and remain in suspension for at least 24 hours
How to prepare and apply LockStar
  • Prior to starting treatment, check and calibrate the sprayer
  • Carefully measure the surface area to be treated and accurately calculate the exact amount of spray solution required
  • Half fill the spray tank with water
  • Add the correct amount of LockStar to the spray tank
  • Agitate the mixture
  • Top up water to the required amount
When to apply

LockStar is best applied before the emergence of weeds. Apply LockStar before weeds emerge during the months indicated, with a single application per season. 

A residual pre-emergent total herbicide for vegetation management.

Suggested period of use

  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
  • Sep
  • Oct
  • Nov
  • Dec