What's New for 2008

Plant health assessment is important during the seedling phase. The 2007-2008 winter, and the early portions of the spring season, has brought substantial moisture into many parts of the state, creating ideal conditions for seedling pathogens. Read Soybean Disease Diagnosis at Emergence and Seedling Growth Stages in the current issue of the Wisconsin Crop Manager»

2008 Soybean Aphid Research Update now available. The North Central Soybean Research Program (NCSRP) just published a 12-page, full-color report that includes soybean aphid biological control, genetic resistance (aphid resistant varieties coming soon), aphid early-warning systems, revisiting the 250 threshold, and treatment recommendations. Order your free print copy from NCSRP by calling 1-800-383-1423. You can also download a copy or read online in pdf format».

Changes in Fungicide Status for Soybean in 2008. Several soybean rust fungicides have been approved for a Section 3 label, others have not, and their Section 18 labels have expired as of November 10, 2007. If you have any unopened canisters of material for products under the Section 18 label, they should be returned to the distributor and not used on soybean. The return requirement is only if the application of the fungicide was for soybean, as these fungicides may be used on other approved crops. Read more on soybean fungicide status»

Sharpen your disease scouting skills — read Soybean CSI - Scouting in the Field (pdf file) by UW plant pathologists Nancy Koval, Paul Esker and Craig Grau.

New Publications

Identification of Soybean Aphids and Look-Alike Species — a new two-page color brochure (pdf)

Pest Management in Wisconsin Field Crops 2008. This comprehensive guide includes herbicide ratings for common weed problems, insect thresholds, scouting information, and management recommendations for insects, weeds, and diseases of corn, soybeans, forages and small grains grown in Wisconsin. Read online (2.5MB pdf) or order a print copy

Edamame is a type of soybean in which pods are harvested at the immature stage and the seeds are eaten as a vegetable.

Considering edamame? Read Growing Edamame in Wisconsin, as presented at the Horticultural Crops Field Day this summer (pdf file) »

Soybean Aphids in Iowa--2007 (SP 247)
A newly revised publication on the soybean aphid by Marlin E. Rice, Matt O'Neal, and Palle Pedersen, extension specialists at Iowa State University. Read online at the ISU Soybean Management website (pdf file) or order a hard copy from the Iowa State University Extension Online Store.

A Visual Guide to the Number of Soybean Aphids per Leaflet
On the inside of this folded card you will see high resolution color photos of four soybean leaflets. Each has a specific number of aphids displayed to help you count when field scouting this pest. The handy, 2-page, color, glossy folded card was prepared by Richard Proost, UW Nutrient and Pest Management specialist and Bryan Jensen, UW Integrated Pest Management specialist. Copies can be ordered from the NPM Program at 608-265-2660 or npm@hort.wisc.edu.

Soybean Growth Stages and Aphid Thresholds — a visual guide to soybean growth stages and the action threshold for soybean aphid management at each growth stage. View pdf»

Herbicide Mode of Action Key for Injury Symptoms (pdf)
A full-color two-sided photographic key to injury symptoms caused by herbicides on corn and soybean. Side one is injury at emergence and side two is injury after emergence. Print copies can be ordered from the NPM Program at 608-265-2660 or npm@hort.wisc.edu.

Identifying Soybean Growth Stages - fact sheet from Michigan State University (pdf)

Soybean Growth and Development
A 28-page publication that explains soybean growth and development through the life cycle of a maturity group II variety. The publication include guidelines on how to recognize different growth stages and apply specific management practices at optimum times.The publication costs $4. It can be ordered by calling the Iowa State University Extension Distribution Center at (515) 294-5247.