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Updated: Jun 24, 2026
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High and Low Throughput Screens with Root-knot Nematodes Meloidogyne spp.
Published on: March 12, 2012
Relationship between Cultural Factors and Nematodes on Merion Kentucky Bluegrass
Journal of Nematology
|March 14, 2009
Summary
Nematode populations in Kentucky bluegrass turf impact grass growth and tillering. Fungicide applications affected nematode levels and thatch acidity, while one nematode species worsened dollar spot severity.
Area of Science:
- Turfgrass Science
- Nematology
- Plant Pathology
Background:
- Kentucky bluegrass (Poa pratensis) turf health is influenced by various biotic and abiotic factors.
- Nematodes are microscopic roundworms that can impact turfgrass health and performance.
- Dollar spot, caused by Sclerotinia homoeocarpa, is a common fungal disease affecting turfgrass.
Purpose of the Study:
- To investigate relationships between seasonal nematode dynamics and turfgrass characteristics.
- To assess the impact of chemical applications on nematode populations and turf health.
- To understand the correlation between specific nematodes and dollar spot severity.
Main Methods:
- A 2-year field study on Merion Kentucky bluegrass turf.
- Monitoring seasonal populations of various nematode species.
- Quantifying grass clipping weight, thatch accumulation, and tiller density.
- Assessing dollar spot severity and recording chemical applications.
Main Results:
- June populations of Tylenchorhynchus maximus were inversely related to previous May's grass wet weight.
- Paratylenchus hamatus, Criconemella rusium, and T. maximus negatively correlated with spring tiller numbers.
- Benomyl applications reduced T. maximus and free-living nematodes, and acidified thatch.
- Hoplolaimus galeatus levels correlated with an approximate 8% increase in dollar spot severity.
Conclusions:
- Nematode population dynamics are linked to turfgrass growth, tiller formation, and disease incidence.
- Chemical interventions for disease control can alter nematode communities and soil conditions.
- Specific nematode species may exacerbate turfgrass disease, highlighting the need for integrated management strategies.
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