Management of Phytophthora Root and Stem Rot of Soybeans

Date
2008-12-11
Authors
Dorrance, Anne
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Abstract

Historically, Phytophthora root and stem rot is a disease that can cause total losses in yield if the wrong variety is planted in a field with high inoculum and saturated soil conditions develop. There have been sporadic epidemics over the past sixty years, with the highest losses recorded in the late 1960's and 1970's. In the past ten years there have been more reports of extensive replanting early in the growing season and higher levels of Phytophthora stem rot later in the growing season. This piece will describe how to recognize this historically important disease but also describe the current management strategies and how to determine when to use fungicide seed treatments.

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