Phytophthora Root &
Stem Rot
of Soybean
Populations of Phytophthora sojae
Example of a P. sojae population
Example of a P. sojae population
Intensive Soil Sampling P. sojae
Variety A:
No Rps genes or Partial Resistance
Variety B :
Rps1a and No Partial Resistance
Variety C:
Rps1k and No Partial Resistance
Variety D:
Rps1k and High Partial Resistance
Variety E :
High Partial Resistance
Partial Resistance to
Phytophthora sojae
Partial Resistance to P. sojae
Rps genes + Partial Resistance
Partial resistance levels
in
Ohio Soybean Performance Trials
Dealing with Phytophthora
sojae
populations