University of Illinois Extension
University of Illinois Extension - Selecting Shrubs for Your Home
Glyphosate Herbicide Injury
Glyphosate herbicide drift on mum.
Severity: varies out of 5
Frequency: out of 5

This herbicide inhibits a key enzyme in the amino acid synthesis pathway.

  • glyphosate (Roundup, Touchdown, etc)

Characteristics of activity:

  • Nonselective.
  • Translocated in both xylem and phloem.

Symptoms of injury:

  • Slow chlorosis/necrosis of plant tissue.
  • Symptoms typically appear in 10 to 14 days after exposure.
  • A change in flower color may be noticed.
  • Stunting

  • Read and follow all label directions.
  • Use caution when applying herbicides around plants as desirable plants may be sensitive and injury may result.
  • Do not spray during cool, wet weather as herbicide is metabolized slower at these times.
  • Do not spray when wind speed and direction are such that herbicide drift is likely to occur.
  • Affected plants may or may not survive herbicide drift; it depends on both the degree of exposure and the plant's tolerance to the herbicide.
  • Water and fertilize plants as needed to promote good plant health.
  • Illinois residents: If you suspect herbicide injury as a result of off-target movement from a nearby application and you are interested in filing a complaint with the Illinois Department of Agriculture, call the Illinois Department of Agriculture's Bureau of Environmental Programs at 1-800-641-3934. To learn more about spray drift and the formal complaint process, visit the Illinois Pesticide Safety Education Spray Drift Resources website.
  • Non-Illinois residents: If you are interested in filing a complaint, contact your state pesticide control official via the Association of American Pesticide Control Officials website.
Associated shrubs: