New Zealand Journal of Agricultural Research abstracts
Ergovaline concentration in perennial ryegrass infected with a lolitrem B-free fungal endophyte in north-west Spain
J. A. Oliveira
Departamento de Biología de Organismos y Sistemas
Área de Producción Vegetal
Campus de Mieres, Universidad de Oviedo
33600 Mieres, Spain
email: oliveira@correo.uniovi.es
G. E. Rottinghaus
Veterinary Medical Diagnostic Laboratory
College of Veterinary Medicine
University of Missouri
Columbia MO 65211, United States
E. González
Centro de Investigaciones Agrarias de Mabegondo
Apartado 10. 15080
A Coruña, Spain
Abstract Ergovaline concentrations in two perennial ryegrass genotypes (EI19 and EI24) infected with one lolitrem B-free fungal endophyte were determined over a 3-year period at two different locations in north-west Spain. There was a significant sampling date effect over 3 years and two locations (P < 0.05). The mean ergovaline concentrations ranged from 0.06 ppm in early spring to 0.57 ppm in June. EI19 genotype had significantly (P < 0.05) higher ergovaline concentrations (0.37 ppm, SE = 0.09) than EI24 genotype (0.33 ppm, SE = 0.08) only at one location in year 2000. Under north-west Spanish conditions, ergovaline levels obtained in this study were not so high to reach values potentially toxic for animals. The results presented in this paper suggest that agriculturally useful ryegrass endophyte associations can be developed free from lolitrem B, and which do not accumulate excessive concentrations of ergovaline.
Keywords climate; ergovaline; Lolium perenne; Neotyphodium endophyte; season; trial plots
A02049 Received 6 August 2002: accepted 11 March 2003; published 30 June 2003
New Zealand Journal of Agricultural Research, 2003, Vol. 46: 117-122
0028-8233/03/4602-0117 $7.00/0 © The Royal Society of New Zealand 2003
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