Phialophora gregata is an deuteromycete fungus that is a plant pathogen which causes the disease commonly known as "brown stem rot of soybean. P. gregata does not produce survival structures, but has the ability to overwinter as mycelium in decaying soybean residue.
Two strains of the fungus exist; genotype A causes both foliar and stem symptoms, while genotype B causes only stem symptoms. Common leaf symptoms are browning, chlorosis, and necrosis Foliar symptoms which are often seen with genotype A are chlorosis, defoliation, and wilting.
There are many ways to manage Phialophora gregata. The most effective form of management is disease resistance, but crop rotation, tiliage, SCN management, and changing the pH of the soil can also be effective
Read more about Phialophora Gregata: Symptoms and Signs, Environment, Disease Cycle, Economic Significance, External Links