3G1 



mycelinm is abundant throughout the diseased tissue and seems to travel 

 between flie cells, dissolving the ini(hlle bunella. 



In case the disease attacks the upper part ot the stem, ttie first effect 

 noticed is that the petioles all droop, or the leaflets droop from the petiole. 

 The leaves soon fall off, and on examination the stallv will be found to 

 contain several black sclerotia. In one garden, examined by the writer 

 last sununer the plants had been attacked by this disease in June after 

 they had attained their growtli, and when examined in August the leaves 



Fig. 4. Black Rot of ginseng showing apothecia. (After Rankin. 



Iiad fallen off, leaving only the straight dead stems containing sclerotia. 

 In this type of injury the root luay send up a new static the next year, 

 but in the year of the attaclc no growth is addetl. 



From observations in tlie diseased gardens it would seem that tlie 

 trouble is increased liy the presence of too nnicli nidistuie; that is, if the 

 fungus occurs in the soil with these conditions present it will produce the 

 disease. One man, whose garden was troubled with tliis disease, stopped 

 it almost immediately Iiy removing the shade and aerating the enclosure. 



The cup fungus, Sclcrotinia Uhertiana Fucliel, has been connected 

 with this disease. This is a soil parasite which is widespread and com- 

 mon on other plants such as hemp, rape, cucumber, tobacco, many forced 



