Family Araliaceae 113 



LEAF ANTHRACNOSE 



Caused by Pestalozzi a funerea Desm. 



Symptoms. This malady attacks the base of the 

 leaves and flower stalks. It results in an early drop 

 of the foliage which also indirectly affects the roots. 

 Spraying with Bordeaux is said to control this 

 trouble. 



ACROSTALAGMUS WlLT 



Caused by Acrostalagmus panax Ran. 



This wilt seems to be destructive only in the spring 

 of the year. It is prevalent wherever ginseng is 

 growing. 



Symptoms. The first evidence of the disease is a 

 slow drying and wilting of isolated plants here and 

 there in the field. At first the leaves droop, suggesting 

 a lack of water in the soil. This, however, is not the 

 case. Outwardly the roots of affected plants appear 

 sound, but on cutting open one of these the fibro- 

 vascular bundles will be found to be yellowed, indicat- 

 ing the presence of the fungus within (fig. 19 i and 1). 

 The spores of the fungus are very minute and are 

 formed on slender branched stalks (fig. 19 k) which 

 appear on the surface of such decayed stems or roots. 

 The fungus also produces sclerotial like bodies (fig. 

 19 k) which apparently serve in tiding it over un- 

 favorable weather conditions. The fungus has been 

 identified by Rankin 1 as Acrostalagmus panax. So 



1 Rankin, W. H., Spec. Crops. U. S., 9 : 349, 1910. 



