Fig. 19. Ginseng Diseases. 



a. Damping off, h.-c. Phytophthora mildew on leaf and root, d. Phytophthora 

 mycelium, e. germination of conidia by means of zoospores, /. germination of conidia 

 by means of germ tubes, g. sexual fertilization of the female oogonium by the male 

 antheridium, h. germinating oospore by means of a germ tube, ». cross section of a 

 root infected with Acrostalagmus showing disea£*?d condition of fibro-vascular 

 bundles, k. fruiting stalks of Acrostalagmus and sclerr'j_"r -: 



root to show presence of mycelium of Acrostalagmut -.;■. vs^.i-,:--. _ ..-- - , . . 



leaf spot, n. Altemaria blight on leaf, o. Altemaria s,is„,.„ ;;;. ^l-...'. 



ing Clip of Sclerotinia panacis {d. e. f. g., and h. afttr i-.—r =.__"- ;..-,; 



after Whetzel and Rosenbaum). 



