Significant. Impactful. Damaging.
Phytophthora causes significant impact on soybean yields.

"One of the things we've learned over the past five years, based on research, is that [Phytophthora and Pythium] are a lot more significant than we originally thought. And especially these cooler winters and springs we've been having [are] helping this pathogen survive."

Dr. Alison Robertson, Iowa State University


Phytophthora is prevalent in wet, heavy clay soils.

Is your soil primed for Phyophthora? Don’t ignore the warning signs.

  • Heavy clay soils with poor drainage
  • Often found in compacted areas of field, such as entrances
  • Periodic rainfall ideal for severe disease
  • Warm soil temperatures of up to 85° F are optimum for infection
  • Often mistaken for herbicide damage

Phytophthora is the #1 disease impacting soybean yield.

More than 532 million bushels lost to Phytophthora from 1996 to 2007.


Losses from Phytophthora rot are staggering, surpassing Rhizoctonia, Pythium, Fusarium and Phomopsis combined.


Phytophthora causes stand reduction and yield loss.

Take action to prevent Phytophora from ravaging your soybean fields.


Damping-Off Phytophthora Sojae
Dair McDuffee, Valent U.S.A. LLC

Root and Stem Rot

Root and Stem Rot Phytophthora Sojae
Martin Draper, USDA-NIFA,

Root and Stem Rot

Root and Stem Rot Phytophthora Sojae
Daren Mueller, Iowa State University,