VEGETABLE AND FIELD CROPS 237 



produced. Here numerous black pycnidia appear, and later 

 the leaf becomes torn. Upon the fruit are large sunken 

 spots of similar appearance. 



Treatment with Bordeaux mixture or ammoniacal cop- 

 per carbonate before transplanting is recommended, fol- 

 lowed by similar spraying in the field. Eight sprayings 

 with Bordeaux mixture in one test yielded 100 fruits, while 

 a similar plat but unsprayed gave only about half as many. 

 Clean culture should be followed. 



Gray mold (Botrytis fascicularis (Cda.) Sacc). — In this 

 rot the purple fruits assume a tan color in blotches, followed 

 by softening of the tissue and rapid development of a gray 

 mold ; the fruit in the meantime changing into a com- 

 pletely rotten mass. 



Anthracnose, glceosporiose {Glceosporum melongenw Ell. 

 & Halst.). — Pits appear upon the fruits, and in these the 

 pink-tinted acervuli. 



Blue mold {Penicillium sp.). — This rot is very similar to 

 blue mold of apples. 



Leaf spot, ascochytose (4scoc%to Lycopersid Brun.). — 

 This fruit spot is very similar to that of phyllostictose.^ 



GINSENG 



Blight, altemariose (Altemaria panax Whet.^). — Brown 

 cankers upon the stem and watery spots in the leaf, often 

 involving the entire top of the plant, mark this disease. 

 Badly blighted plants appear as if drenched Avith boiling 

 water. 



It is a serious menace to the ginseng industry of New 

 York State, often causing the leaflets of entire beds to be 



1 Whetzel, H. H., Sci. u. =. SO, 912, June 4, 1909. 



