CYLINDROSPORIUM. 



489 



As yet the disease has been observed in quantity only in 

 the neighbourhood of Oberammergau (Upper Bavaria). 



C. padi Karst. Leaf-blight of cherry and plum. This dis- 

 ease is most destructive in the nursery, causing premature 

 defoliation of young trees ; it may also cause severe injury to 

 fruit-bearing trees. The leaves become spotted and perforated 

 by holes caused by the falling out of withered spots. Spraying 

 with dilute Bordeaux mixture early in the season is said to 

 have good effects.^ 



Fio. 300.— A fruit from Fig. 299 (enlarged). A, Two pustules still further 

 enlarged. £, Pustules before and after rupture of the epidcnnis. f, Isolated 

 conidia. (v. Tuheuf del.) 



C. filipendulae Thiim. occurs on leaves of Spiraea Filipendula. 



C. ficariae Berk. On leaves of Ranunculus Ficaria. (Britain.) 



C. viridis E. et E., and C. minus E. et E. On leaves of Fraxinus viridis 

 in the United States. 



C. cercosporoides E. et E. On living leaves of tulip-tree. 



C. saccharinum E. et E. On living leaves of Acer saccharinum in the 

 United States. 



Crj^jtosporium. 



Conidial cushions shaped like pycnidia. Conidia rod-like or 

 spindle-shaped. 



Cryptosporium leptostromiforme Ktihn." This fungus forms 

 rows of black stromata on the stems of lupines; in the stromata 

 are formed pycnidia-like cavities with several neck-like openings, 

 and in them conidia are given off from couidiophores. The 

 conidia are rods with rounded ends 7-8'5ju long and about 

 2 IX broad: they emerge from the necks of the cavities as 

 long tendril-like chains, and may be continuously given off 



iPairchild (Journal of Mycology, vii., p. 249) gives results of remedial 

 treatment. 



^J. Kiihn, Berichte d. landwirth. Inst., Halle, 1S80. 

 Fischer, " Gryptosporium Uptostrmnifomie." Breslau, 1893. 



