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Ministry of Agriculture, Food and Rural Affairs


Trade Names: Authority, Spartan

Group 14

Site of Action: Inhibitors of protoporphyrinogen oxidase (Protox)


Following PRE emergent application:

  • Seedlings emerge
  • Once exposed to the light they turn necrotic and quickly die

Following foliar contact from POST emergent application:

  • Rapid desiccation and necrosis of exposed plant tissues

Uptake and Translocation

  • Absorbed through the roots and foliage


  • Relatively persistent
  • Half-life in field: 110- 280 days
Sulfentrazone injury on potato
Click to enlarge.