Publication Date
1989
Description
Field and glasshouse experiments indicate that several nematodes damage ryegrasses and white clover (Cook and York, 1985). Populations of these nematodes under grassland are often at potentially damaging densities. Several nematode species of long-term grassland have co-evolved host relationships in which host resistance is likely to have been selected. This is of direct practical relevance to the control of three nematodes, widespread in England and Wales: the root-knot nematode (Meloidogyne naasi) on ryegrasses; and the stem nematode (Ditylenchus dipsaci) and cyst nematode (Heterodera trifolii) on white clover. Our objectives have been, first, to identify resistant and susceptible phenotypes, and then to define the mechanisms of resistance and the genetics of plant reactions. Plants with defined and characterised reactions can then be used to assess the extent of variation in virulence in nematode populations, and the likely agricultural value of resistance. Progress in these studies is reported.
Citation
Cook, R and Mizen, K A., "Resistance to Plant Parasitic Nematodes in Ryegrasses and White Clover" (2025). IGC Proceedings (1989-2023). 24.
https://uknowledge.uky.edu/igc/1989/session6/24
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Resistance to Plant Parasitic Nematodes in Ryegrasses and White Clover
Field and glasshouse experiments indicate that several nematodes damage ryegrasses and white clover (Cook and York, 1985). Populations of these nematodes under grassland are often at potentially damaging densities. Several nematode species of long-term grassland have co-evolved host relationships in which host resistance is likely to have been selected. This is of direct practical relevance to the control of three nematodes, widespread in England and Wales: the root-knot nematode (Meloidogyne naasi) on ryegrasses; and the stem nematode (Ditylenchus dipsaci) and cyst nematode (Heterodera trifolii) on white clover. Our objectives have been, first, to identify resistant and susceptible phenotypes, and then to define the mechanisms of resistance and the genetics of plant reactions. Plants with defined and characterised reactions can then be used to assess the extent of variation in virulence in nematode populations, and the likely agricultural value of resistance. Progress in these studies is reported.
