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IPM Approach for Managing Soybean Cyst Nematode

April 27, 2001
An ideal program to manage soybean cyst nematode (SCN) infestations should integrate the following: detection through scouting and sampling procedures and crop rotations utilizing nonhost crops and SCN-resistant soybean varieties. Maintaining proper soil fertility and pH, managing other soybean diseases and pests, and proper planting methods also help to keep plants vigorous and better able to buffer the effects of SCN. The most effective management systems have and will continue to involve integrated approaches. No single method will manage SCN as effectively.

The success story of managing SCN has been the use of resistant varieties. Twenty years ago, only a small number of varieties that resisted SCN were available. Today, through the efforts of public and private soybean breeders, this list has expanded to approximately 700 lines, adaptable to Illinois and available for the 2001 growing season. Marion Shier, crops systems educator, Livingston County, compiles yearly a list of public and private varieties resistant to SCN titled "Soybean Varieties with Soybean Cyst Nematode Resistance." All varieties are listed by maturity group and relative maturity within the groupings, a coding system is used that designates companies making the variety available, and a listing of race resistance and source of resistance for each variety is included. The Illinois Checkoff Board has published this listing in booklet form, and free copies may be obtained by contacting:

The Illinois Soybean Checkoff Board

1605 Commerce Parkway

Bloomington, IL 61704

Telephone: (309)663-7692

FAX: (309)663-6981


Limited numbers of the booklet are available also by contacting the author of this article.

Resistant varieties are the foundation for IPM approaches in managing SCN as well as other plant diseases. Some distinct advantages of using host resistance are that the pest control is purchased with the seed, is compatible with other management practices, and has few adverse effects on the environment, and the cost is minimal in most cases.--Dale I. Edwards

Author: Dale I. Edwards

The Pest Management and Crop Development Bulletin
Executive Editor: Kevin Steffey, Extension Entomologist

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