Publication Date
1993
Description
The effects of 3 non-persistently aphid-transmitted viruses on the productivity of swards of annual pasture legumes were investigated in 1988-91. Virus-host combinations studied were alfalfa mosaic virus (AMV) in burr medic (Medicago polymorplia), cucumber mosaic virus (CMV) in subterranean clover (Trifo/i111n subterra11eum) and bean yellow mosaic virus (BYMV) in subterranean clover. Swards were mown to simulate grazing, grazed or left undefoliated. Herbage (dry weight) and seed production were decreased significantly by infection with all three virus-host combinations. However, the extent of losses vnried with extent of virus spread, cultivar, site and season. Decreased seed yield resulted from both fewer and smaller seeds being produced, With the first two virus-host combinations, losses occurred in the first year and after natural sward regeneration in subsequent years. Decreased seed production due to virus infection has important implications for both the regeneration and legume content of annual pastures.
Citation
Jones, R A. C, "Effects of Three Viruses on Productivity of Annual Pasture Legume Swards" (2024). IGC Proceedings (1993-2023). 16.
https://uknowledge.uky.edu/igc/1993/session22/16
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Effects of Three Viruses on Productivity of Annual Pasture Legume Swards
The effects of 3 non-persistently aphid-transmitted viruses on the productivity of swards of annual pasture legumes were investigated in 1988-91. Virus-host combinations studied were alfalfa mosaic virus (AMV) in burr medic (Medicago polymorplia), cucumber mosaic virus (CMV) in subterranean clover (Trifo/i111n subterra11eum) and bean yellow mosaic virus (BYMV) in subterranean clover. Swards were mown to simulate grazing, grazed or left undefoliated. Herbage (dry weight) and seed production were decreased significantly by infection with all three virus-host combinations. However, the extent of losses vnried with extent of virus spread, cultivar, site and season. Decreased seed yield resulted from both fewer and smaller seeds being produced, With the first two virus-host combinations, losses occurred in the first year and after natural sward regeneration in subsequent years. Decreased seed production due to virus infection has important implications for both the regeneration and legume content of annual pastures.
