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Ministry of Agriculture, Food and Rural Affairs

Halosulfuron

Trade Name: Sandea

Group 2

Site of Action: Inhibitors of acetolactate synthase (ALS) and also called acetohydroxyacid synthase (AHAS)

Symptoms

Following POST emergent application:
  • Rapid growth inhibition occurs
  • 3- 7 days later, sometimes sooner, chlorosis occurs
  • 7- 14 days later the growing point dies
  • 14- 21 days later the plant dies completely
Following PRE emergent application:
  • Seed germination is not inhibited
  • The shoot growing point usually quickly undergoes chlorosis and necrosis, although there are some seedlings that can remain green for 2 weeks before dying
Uptake and Translocation
  • Absorbed through roots, shoots and foliage
  • Translocated within the plant
Persistence
  • Short to moderate persistence
  • May cause carryover injury onto sugar beets

Halosulfuron injury on Cucurbit Halosulfuron injury on Pepper Halosulfuron injury on tomato Click to enlarge.