ABSTRACT


Milán Caglevic D.1 y Cecilia Urbina de Vidal2
 
More than 200 samples of wheat and barley plants, from 57 different places,were studied during the season 1975-76. Many samples showed symptoms very similar
to BYDV.Diagnosis of the disease was based on transmission experiment and electron microscopy.
- Transmission experiment with the viruliferous aphid species Macrosiphum (Sitobion)avenae Fabr. incited, after 13 days, chlorosis of the leaves, on caged wheatand barley plants (and some stunting on barley).M. avenae is one of the aphid species important as pests of cereals in Chile.
- Electron microscopy (thin cutting and negative staining). The virus (BYDV) presencewas revealed in the leaf phloem-cells of wheat and barley, showing sphericalparticles about 24-27 nm in diameter.
Key words:
1Ing. Agr. M. S., Fitopatólogo, Estación Experimental La Platina, Instituto de Investigaciones Agropecuarias (INIA) Casilla 5427, Santiago, Chile.
2Biólogo celular, Jefe del Grupo de fitocitología, Departamento de Biología y Genética, Sede Norte, Universidad de Chile, Casilla 6556, Santiago, Chile.