Project Details:

Increasing Iowa soybean profitability by renewing interest in managing the soybean cyst nematode

Parent Project: This is the first year of this project.
Checkoff Organization:Iowa Soybean Association
Categories:Soil and tillage management, Nematodes, Insects and pests
Organization Project Code:
Project Year:2009
Lead Principal Investigator:Gregory Tylka (Iowa State University)
Co-Principal Investigators:

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Information and Results

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Project Summary

The soybean cyst nematode (SCN) is commonly considered to be the most damaging pest of soybeans. Unmanaged, this nematode can reduce soybean yields by 50% or more. Yield losses total many millions of dollars annually in Iowa. Despite being known in Iowa for nearly 30 years, many growers currently are unaware or unconcerned about the effects of SCN until serious damage occurs in their fields, often when very dry conditions occur during the growing season. Unfortunately, SCN management is most effective and profitable when it is initiated while population densities are low or moderate. In other words, the key to successful long-term SCN management is discovering infestations before population densities become high.

Some Iowa growers have scouted for SCN properly and identified the presence of SCN in their fields. These growers have managed the pest effectively and profitably using SCN-resistant soybean varieties. Unfortunately, there is a narrow base of SCN resistance genes used in soybean varieties, and it seems that SCN populations are developing that have elevated reproduction on the common source of SCN resistance, PI88788.

Project Objectives

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Progress of Work

Final Project Results

Benefit to Soybean Farmers

This project will raise the profitability of soybean production on SCN-infested fields in Iowa by educating growers and agribusiness personnel about the basic biology and management of SCN. Targeted individuals for this effort include those who are unaware or unconcerned about SCN and those who have managed the pest effectively in the past but are beginning to see the resistance starting to lose its effectiveness.

Performance Metrics

Project Years