Phytophthora Root and Stem Rot - Agronomic Impact

Yield losses caused by Phytophthora sojae can be substantial, especially in areas that have been in soybean production for many years. Entire fields can be destroyed when conditions are right. The amount of damage depends on the soybean growth stage and the level of partial resistance that a soybean variety has to P. sojae . Stands that are highly susceptible and are infected early suffer the largest losses.

Replanting costs plus reduced yields due to later planting dates are the hidden costs of Phytophthora infection early in the season.

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