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Ministry of Agriculture, Food and Rural Affairs

Chlorimuron-ethyl

Trade Name: Classic

Group 2

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

Symptoms

POST application:
  • Plants quickly stop growing
  • After 3-5 days leaves appear chlorotic following by chlorosis at the growing point
  • After 7- 21 days, there is usually complete foliar necrosis and plant death
  • Certain susceptible species may stay green but are stunted

Uptake and Translocation

Following foliar application:
  • Rapidly absorbed through the leaves
  • Translocated in both xylem and phloem

Persistence

  • Limited residual activity after application
  • Half-life in field: 40 days
  • May cause carryover injury onto vegetable crops the year after application