328 GREENHOUSE MAKAGEMBKT. 



them. The remedies will be the same as for the rose 

 rust. 

 ANTHRACsrosE OF THE ROSE {Olososporium rosavum). 



Like many other plants, the rose has its anthracnose,. 

 ■which sometimes proves very troublesome. The spores, 

 falling upon the young tender canes, germinate, and 

 spreading through the tissues destroy the cells and even 

 girdle the canes. The circulation is thus cut off to a 

 greater or less extent, and many if not all of the leaves 

 drop from the plant. The disease manifests itself at 

 the exterior in the form of minute pimples in which the 

 spores are formed. They are transferred to other plants 

 in water. Other blotches can be found upon the leaves, 

 particularly upon those that have fallen upon a damp 

 surface. 



The spores readily germinate, and as they are pro- 

 duced in great abundance, the disease may, under favora- 

 ble conditions, spread very rapidly. The spread of the 

 disease seems to be toward the tips of the branches, and 

 frequently apparently healthy shoots appear at the base 

 of diseased ones. As soon as the disease appears upon a 

 plant, the infected portions should be cut off and burned. 

 As the Bordeaux mixture and copper compounds are 

 fatal to the spore development of fungi, the spread of 

 the disease can be prevented by thoroughly spraying the 

 plants. This disease is closely related to the anthrac- 

 nose of the raspberry, and its development is both 

 invited and hastened by such unfavorable conditions as 

 poorly drained or exhausted soil. 



FUNGOUS BISEASES OF THE CAEISTATION'. 

 CAKNATION RUST. 



This destructive disease ( Uromyces caryophyllinus), 

 has long been known in Europe, but although it had 

 undoubtedly appeared here previous to that time, its 

 nature was not known in this country until the fall of 



