THE DISEASES OF FRUITS. 237 



ing the growing season have not shown that this anthracnose 

 is easily checked ; but further tests need to be made before a 

 conclusion in the matter is reached. 



The Raspberry. — The chief diseases here are the rust and 

 anthracnose mentioned already under blackberry, with which 

 the raspberry is very closely related. There are some leaf- 

 spot fungi also common to these two species of brambles. 



The Currant. — Cane Blight {^N cctria cinnabarina Fr.) is one 

 of the newer diseases, but is becoming quite abundant in some 

 localities. This affects the whole cane, causing it to die some- 

 times when bearing fruit of nearly full size. Along with the 

 shriveling of the berries and fall of the leaves the diseased 

 canes show numerous bright pink pimples (see Fig. 292). 

 This disease' is related to the black knot of plum and cherry, 

 and like it has taken a firm grip upon its victim before its 

 presence is observed. 



Remedies.- — The whole plant should be removed and burned 

 as soon as the blasted canes are found. Spraying is too slow 

 a treatment, even if it were effective, with a disease so contagi- 

 ous as this upon plants that are small and easily rooted out 

 and the ground occupied with some other crop. 



The Anthracnose {Gloeosporium ribis M. & D.) causes minute 

 dark spots upon the leaves, followed by yellowing and their 

 dropping from the canes. When very severe, the green fruit 

 is left to shrivel upon the defoliated branches, but usually the 

 fall of the leaves is shortly after the crop is harvested. 



Remedies. — This fungus is closely related to other anthrac- 

 noses previously considered and may be controlled by the 

 use of the standard fungicides. 



The Leaf Spot {,Septoria ribis Desm.) is a fungus. that pro- 

 duces effects similar to those of the anthracnose, while its 

 microscopic structure is quite different. 



Remedies.— '&-gta.Ym% should be thorough and begin early in 

 the season. The currant is well adapted in size for the ap- 

 plication of fungicides, and any adhering lime upon the smooth 

 fruit is easily removed. To avoid this coating a clear mixture 

 may be used instead of one containing lime. 



The Gooseberry.— The diseases of the currant are practi- 

 cally the same as those of the gooseberry, and all that has been 

 remarked above regarding them generally applies here. 



