364 



smiins iif lliis Crown Itdt fmit^us — secured rmiii vnriniis parts of the 

 ((iiiutry — on culture media in an effort t<i classify tln-m. Cultures were 

 made on a larjre iiunil)er of media, including: nnli'ient apir. potato agar, 

 iican pluiis. jHitatd iiluu's. ginseui,' plug's, sweet iiotaloes. turnii)S. nutrient 

 gelatin, corn-meal. Jtaullns' culture fluid, and several others. Ou all the 

 media mentioned the various strains made a good growth, the optinmm 

 being at the tciupei-ature of '2(t° C. On several of the media the growths 

 of a number of the strains were unlike, so there may he more than one 

 species, l)ut as the fruiting stages were not obtained, this conld not be 

 deterniii'ed delinitely. 



'I'lic Ci'own Itot is apparently disseminated in two ways; by the myce- 

 iium and by spores. The mycelium may grow through the soil to other 

 roots or it may l>e distributed by iuijilements used in spading or weeding 

 the beds. The spores may be scatteied by the wind and rain or they may 

 may be carried on diseased seedlings or on the shoes and clothes of peo- 

 ple visiting the various gardens. As stated before, this fungus grows on 

 a luimber of ]ilanls otlier than ginseng .and it may .also gain entrance to 

 the ginseng garden directly from these other plants by any of the agencies 

 given above. 



The growth of this fungus does not seem to be affected by any change 

 in the acidity or .-ilkalinity of the soil which could be brought about in 

 the field. I'litil some better means of combating it is found. tJie old 

 lotted I'ools should be carcfuliy dug and luii'iied so as to remove the 

 i'angcr of infection from the cup stage in the sjiring. The attacked stems 

 should also be removed ;Mid linrped as soon as noticed. Spraying with 

 bordeaux nii.xtiire will ]ii'oliably lessen the injury to tlie stems above 

 irronnd. In addition to tliis the garden should lie well-di-ained. and if the 

 disease becomes \ ci-y prevahait. it would be well to remove part of the 

 over-bead coveiing and loosen tlie si il around tlie jilanls so as to allow 

 tl)eni to dry out. 



WflJKIsIl CdlJCf/C. 



Cniirfordsrinr. IikL, -I iiii< /7, IdU. 



i 



