University of Arizona a dot Cooperative Extension

Herbicide Symptoms

by Pat Clay, Kai Umeda and Bill McCloskey

Miscellaneous chemistry herbicides

  • Foliar applied
  • Shoot absorbed
  • Not readily translocated
  • Broadleaf weeds

Nitrile herbicides

Buctril (bromoxynil) -

  • Chlorotic mosaic (on cotton)

Photo of chlorotic mosaic on cotton plants.

Photo of chlorotic mosaic on cotton plants.

Roundup (glyphosate) -

  • Chlorosis followed by necrosis (cowpea)

Photo of dead cowpea plants all bleached out.


  • Immediate cessation of growth
  • Stacked nodes (regrowth)

Photo of cotton plants with stacked nodes.


  • Interveinal chlorosis at sub-lethal dose

Photo of interveinal chlorosis at sub-lethal dose on corn.


Photo of glyphosate caused chlorosis on lettuce seedlings.

Photo of glyphosate caused chlorosis on spinach seedlings.

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Full Disclaimers

Issued in furtherance of Cooperative Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, James A. Christenson, Director Cooperative Extension, College of Agriculture, The University of Arizona.

The University of Arizona is an equal opportunity, affirmative action institution. The University does not discriminate on the basis of race, color, religion, sex, national origin, age, disability, veteran status, or sexual orientation in its programs and activities.

Because labels are subject to frequent change, always consult the label attached to the product before using any pesticide. The user must assume responsibility for proper application and for residues on crops as well as for damage or injury caused by pesticides, whether to crop, person or property.

Any products, services, or organizations that are mentioned, shown, or indirectly implied in this web document do not imply endorsement by The University of Arizona.

Erin Taylor, Extension Agent, Field & Veg Crops
Kai Umeda, Area Extension Agent, Vegetable Crops
William B. McCloskey, Extension Weed Specialist
College of Agriculture, The University of Arizona, Tucson, AZ.
Material written September 2002.

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Copyright © 2001 University of Arizona,
College of Agriculture and Life Sciences