PLATE XXVIII 

 Sclerotinia libertiana: 



Fig. I. — Root inoculated with Sclerotinia libertiana from lettuce. Note the white 

 mycelial felt and the production of sclerotia. 



Fig. 2.— Three roots (on left) inoculated with Sclerotinia sp. from ginseng. Healthy- 

 check root (on right). 



Fig. 3. — ^Apothecia from sclerotia from celery strain. 



Fig. 4. — Apothecia from sclerotia from ginsen'g strain. 



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