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Ministry of Agriculture, Food and Rural Affairs


Trade Names: Glyfos, Roundup, Touchdown, Vantage

Group 9

Site of Action: Inhibitors of 5-enolpyruvaylshikimimate-3-phosphate synthase (EPSP)


  • Arrow-shaped, puckered, upward cupped
  • May be interveinal chlorosis
  • Symptoms from point where herbicide contacted leaf to the end of the shoot
  • Second year may be severely strapped


  • Shortened internodes
  • Numerous lateral shoots resulting in bushy appearance
  • Second year early shoot growth is stunted

Uptake and Translocation

  • Absorbed through foliage
  • Translocated throughout the plant


  • None- crops can be planted or seeded directly into treated areas following application
  • Half life in field: 47 days

Often Confused With
Eutypa Dieback – trunk cankers with fruiting bodies; necrotic flecks on leaves

Period of Activity
Symptoms develop about 2 weeks after exposure.

Management Notes
Applications should be made before the end of grape bloom, or with shielded sprayers or wiper equipment.

Glyphosate on leaves Glyphosate on shoot Glyphosate on shootClick to enlarge.