2022 Update on Disease Surveillance in Soybeans, Peas and Dry Beans and On-Farm Fungicide Evaluation Results
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.
Each year, a representative sample of soybean, field pea and dry bean fields are surveyed for root, foliar and stem diseases across Manitoba. Here are the results from the 2020 foliar and stem disease surveys and foliar fungicide results from the On-Farm Network.
In 2020, 63 soybean fields, 40 dry bean fields and 46 pea fields were surveyed in Manitoba for root diseases.
About Phytophthora Phytophthora root rot (PRR), caused by Phytophthora sojae, is a root and stem disease specific to soybeans. Unlike…
Race-specific resistance (Rps geners) and partial resistance (field tolerance, quantitative resistance) to Phytophthora.
Seedling Disease/Root Rot The terms “seedling disease” and “root rot” generally refer to the root rot complex that can infect…
Tips on identification and management of foliar diseases in pulse and soybean crops.
Stem and root diseases can have a greater impact on soybean yield and quality than foliar diseases. Stem disease symptoms…
The presence of Soybean Cyst Nematode has been confirmed in Manitoba.
Preventative action, early detection and timely management are key in avoiding significant yield loss from SCN.
Root rot symptoms are often overlooked by farmers seeking to identify the cause of under performance in a crop.
The following risk assessment was developed to help farmers and agronomists identify where seed treatments are most likely to be beneficial by describing the factors that influence soil insect populations and fungal pathogens.
The root rot complex affects soybeans and pulse crops. This resource describes symptoms and management options.
A timeline that indicates when to scout for soybean insect and disease pests, and their impact on production and quality.
A visual guide to soybean insect and disease pests in Manitoba.
Pests to consider, recommendations and research results for seed treatment use in soybeans.