HPPD (HG 27) Inhibitor Herbicide Injury in Soybean
Published: 09/08/2023
Hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors, or Group 27 herbicides, interfere with pigment synthesis. HPPD-inhibitors can move through plants in a variety of ways (xylem, phloem, or both) depending on the specific chemistry and plant species. In soybean, symptoms are most often visible on the newest leaves.
Symptoms include chlorosis, bleaching, and tissue death. Injury may occur as a result of carry over either due to reduced dissipation during dry years or in areas where overlapping applications occurred. Carryover injury can appear as crinkling or strapping of leaves with bleached tips and plant stunting. Carryover injury on soybean can sometimes be confused with growth regulator injury and mesotrione carryover can show up when soybeans reach the V2 growth stage. Drift from a nearby application to corn may also result in injury.
HPPD inhibitor herbicide injury on soybean.
Adam Sisson
HPPD inhibitor herbicide injury on soybean.
Kristine Schaefer
See the Herbicide Classification Chart from Take Action for herbicide selection information to help slow the development of resistant weeds.
Prepared and reviewed by Dr. Thomas (Tommy) Butts, University of Arkansas; Dr. Joe Ikley, North Dakota State University; the Integrated Pest Management Program at Iowa State University; Dr. Sarah Lancaster, Kansas State University; Dr. Travis Legleiter, University of Kentucky; and Dr. Rodrigo Werle, University of Wisconsin-Madison.
HPPD inhibitor herbicide injury on soybean. By Adam Sisson.
HPPD inhibitor herbicide injury on soybean. By Kristine Schaefer.
HPPD inhibitor herbicide injury on soybean. By Adam Sisson.
HPPD inhibitor herbicide injury on soybean. By Adam Sisson.
Gallery images courtesy Adam Sisson, Iowa State University and Kristine Schaefer, Iowa State University.
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