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Phytophthora Root Rot in Soybeans
Phytophthora root rot (PRR) is a soil-borne root and stem disease of soybeans caused by Phytophthora sojae. Unlike other root rot pathogens, P. sojae may infect soybeans at any growth stage. P. sojae is an oomycete pathogen, also called a water mould, that may remain dormant in the soil for several years. Infection of plants…
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2022 Disease Prevalence and Management Tools
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Declining Sources of Resistance to Phytophthora Root Rot in Soybeans and How to Manage It
SINCE the mid-1950s, many soybean growers across Canada have struggled with Phytophthora root rot (PRR), caused by the oomycete Phytophthora sojae. Once the disease is present in their fields, farmers must deal with it for a long time as surviving spores will persist in the soil for approximately 10 years.
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2020 Foliar Disease Survey and On-Farm Fungicide Trial Results
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2020 Update on the Status of Root Rots in Soybeans, Dry Beans and Peas
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Phytophthora Root Rot
About Phytophthora Phytophthora root rot (PRR), caused by Phytophthora sojae, is a root and stem disease specific to soybeans. Unlike other root rot pathogens, PRR can infect soybeans at any development stage. It is an oomycete pathogen, also called a water mould, that can remain dormant in the soil for at least four years. Infection…
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Resistance to Phytophthora Root and Stem Rot in Soybean
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Scouting for Early Season Diseases
Seedling Disease/Root Rot The terms “seedling disease” and “root rot” generally refer to the root rot complex that can infect pulse and soybean crops. Diseases that make up the root rot complex differ slightly among these crops. Fusarium spp., Pythium spp. and Rhizoctonia solani can infect all pulses and soybeans, Phytopthora sojae can infect only…
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Soybean Stem Diseases
Stem and root diseases can have a greater impact on soybean yield and quality than foliar diseases. Stem disease symptoms typically arrive later in the growing season during mid- to late- reproductive stages, which can directly impact pod and seed production. The most prevalent and economically important diseases in this category are white mould (Sclerotinia)…
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Survey of Soybean, Field Pea and Dry Bean Root Rots in Manitoba
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Soybean Seed Treatments: Assessing Your Risk
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Root Rot Complex – Symptoms and Management
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Soybean Insect and Disease Scouting Calendar
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Soybean Insect and Disease Identification Guide
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Soybean Seed Treatment Risk Assessment
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