2 9 4 
Journal of Agricultural Research 
Vol. V, No. 7 
made on injured and uninjured plants, which were then covered with bell 
jars for 4 days. At the end of 12 days most of the plants showed signs of 
rotting. Unlike the ginseng roots (Pi. XXVIII, figs. 1 and 2) previously 
discussed, infection occurred not only on the injured, but also on the 
uninjured plants. 
Fig. t. — Sclerotinia libertiana: A, Camera-lucida drawing showing branched and unbranched paraphyses, 
asci, and as cospores; B, camera-lucida drawing showing methods of ascospore germination. Those 
within the asci germinate by sending germ tubes directly through the walls of the ascus. 
BLACK-ROT OF GINSENG 
Van Hook (1904, p. 181-182) first mentions a species of Sclerotinia as 
the cause of a black-rot of ginseng. Rankin (1912) reports the discovery 
of the apotheda and established a new spedfic name for the fungus. No 
inoculations were attempted, either on the ginseng roots or on other hosts 
known to be attacked by spedes of Sderotinia closely allied to this one. 
