Phytophthora Root Rot of Soybean

January 08, 2019 / By Rupp Seeds

Screen shot image of SeedSCOOP publication discussing Phytophthora Root Rot of soybeans.

Phytophthora root rot (PRR) is common in soybean fields and causes a wet, soft rot of the seed or seedling tissue. The disease can affect soybean from the seedling stage to near maturity. Stands may be reduced when the pathogen, Phytophthora sojae, infects plants at the seedling stage and causes seed rot and damping off. Infection of older plants causes wilting and browning of leaves and eventual death. Rapid development can occur when soil is high in moisture or there is a periodic rainfall pattern with continued availability of moisture. Soil temperatures above 60 degrees F, and air temperatures between 70 and 77 degrees Fahrenheit favor the disease. It is common in soils that are: low lying, poorly drained, compacted, and/or high in clay content. Learn more about yield impact and how to manage against phytophthora in soybeans in this issue of SeedScoop. Most Rupp soybeans have resistance to specific races of Phytophthora. 

Phytophthora Root Rot of Soybean