Hermilia Sauz B.-M.1
Samples of onion seedlings showing pink root were collected in Llay-Llay. A fungus like Pyrenochaeta terrestris was isolated from them. The pathogenicity test done on healthy onion seedlings growing on the inoculated soil showed that P. terrestris is in Chile and it is the pathogen responsible for this disease.
1Ing. Agr., Proyecto Fitopatología, Estación Experimental La Platina., Instituto de Investigaciones Agropecuarias, Casilla 5427, Santiago, Chile.