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Soybean Cyst Nematode Reduces Soybean Yield Without Causing Obvious Aboveground Symptoms
J Wang1, T L Niblack1, J A Tremain2
1Department of Plant Microbiology and Pathology.
Plant Disease
|March 1, 2019
Summary
Soybean cyst nematode (Heterodera glycines) infection significantly reduced soybean yield, biomass, and development, even without visible symptoms. Resistant soybean cultivars mitigated these negative impacts.
Area of Science:
- Agronomy
- Plant Pathology
- Nematology
Background:
- Soybean cyst nematode (Heterodera glycines) is a major pathogen affecting soybean production.
- Understanding the impact of H. glycines on soybean growth and yield is crucial for effective management.
Purpose of the Study:
- To investigate the effects of H. glycines infestation on soybean growth, development, and yield.
- To compare the performance of soybean cultivars with differing resistance levels to H. glycines.
Main Methods:
- Field experiments were conducted across multiple US Midwest locations from 1997-1999.
- Soybean cultivars, one resistant and one susceptible to H. glycines, were grown in alternating strips.
- Plant growth, development, and yield were monitored throughout the growing season.
Main Results:
- H. glycines infection reduced plant height, biomass, and delayed reproductive development in susceptible soybeans.
- Yield reductions in susceptible cultivars were significant, occurring without visually detectable symptoms.
- Resistant cultivars showed reduced negative impacts compared to susceptible ones.
Conclusions:
- Soybean cyst nematode significantly impacts soybean yield and development, necessitating the use of resistant cultivars.
- The absence of visible symptoms in infected susceptible soybeans highlights the importance of monitoring and resistant varieties.
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