Bobbelblad bij sla

Summary In The Netherlands symptoms of big vein were found in lettuce and endive (Cichorium endivia L.). In the roots of these plants sporangia ofOlpidium occurred. In the glasshouse healthy lettuce plants showed symptoms when planted in infected soil.Gedetacheerd bij het Proefstation voor de Groenteteelt in de Volle Grond in Nederland, Alkmaar.