Field Crops Plant Pathology

 

Soybean Aphid

• Soybean aphid (Aphis glycines) in Wisconsin
• Soybean aphid biological control:  parasitoids
• Aphid management recommendations 2011
• Identification of Soybean Aphids and Look-Alike Species (pdf)
• Soybean Development Stages and Soybean Aphid Thresholds (pdf)
• A Visual Guide to the Number of Soybean Aphids per Leaflet (pdf)
• NCSRP Soybean Aphid Research Report (4.6 MB pdf)

Asian Soybean Rust

• About Soybean Rust/Scouting for Soybean Rust
• Using a Hand Lens
• Soybean Rust Disease Cycle
• Managing  Soybean Rust
• Identifying Soybean Reproductive Growth Stages (pdf)

Bean Leaf Beetle

Bean Pod Mottle Virus/Bean leaf beetle complex

 

Brown Stem Rot

• Brown Stem Rot in Wisconsin
• Brown Stem Rot (pdf)
• BSR Management and Variety Options (pdf)
• Soil pH Influences Soybean Disease Potential (BSR and SCN) (pdf)

Charcoal Rot
Downy Mildew
Frogeye Leaf Spot

Green Stem Disorder (link to the North Central Soybean Research – Plant Health Initiative website)

Phytophthora Stem and Root Rot

• Phytophthora Stem and Root Rot in Wisconsin

• Phytophthora root rot-like symptoms on soybeans containing Rps 1k in Wisconsin in 2008. A poster presented at the 2009 North Central American Phytopathological Society meeting in Ames, Iowa (pdf)

Powdery Mildew (pdf)

Seedling Diseases

• Early season infection and seedling health
• Common Soybean Seedling Diseases (pdf)
• Soybean Seed Fungicides
• Specific Activity of Soybean Seed Fungicides (pdf)
• Phytophthora Stem and Root Rot

Septoria Leaf Spot (Brown Spot)

Soybean Cyst Nematode

• Soybean Cyst Nematode in Wisconsin

• Soybean Cyst Nematode Sampling and Testing in Wisconsin (pdf)

• NCSRP SCN Management Guide – 5th Edition (pdf)

Stem canker – Diaporthe complex (pdf)

Sudden Death Syndrome

• Sudden Death Syndrome in Wisconsin
• Sudden Death Syndrome: Finding Solutions for Farmers 12-page full-color bulletin (pdf format)

 

White Mold

• White mold in Wisconsin
• White mold disease cycle
• White mold risk assessment
• White mold management
• White Mold (Sclerotinia stem rot) (link to a printable pdf)

View video: Paul Esker visits a soybean field during a year of severe white mold to discuss symptoms, risk, and prevention in subsequent years.

 

 

 

Soybean Viruses

• Soybean Viruses
• Bean pod mottle virus
• Soybean mosaic virus and Alfalfa mosaic virus
• Epidemiology and control of soybean viruses
• How researchers work with viruses – Indicator plants and ELISA technique
• Seasonal progression of viruses
• How to recognize a virus problem