CURRANT DISEASES 219 



gooseberries, whether healthy or diseased, is essential. The 

 situation is critical, and unless the proper measures are taken 

 at once the disease will have reached a range beyond any possible 

 control. The fruit-grower must face this problem : that, irre- 

 spective of his innocence and his personal feelings in the matter, 

 the total destruction of his currant and gooseberry bushes 

 should not be delayed when he has the official information that 

 such should be done. In a preliminary way the grower can 

 cooperate by making inspections of Ribes, beginning about July 

 first. 



REFERENCES 



Spaulding, P. The white-pine blister rust. U. S. Agr. Dept. Farmers' 



bul. 742 : 1-15. 1916. , 

 Spaulding, P. The blister rust of white pine. U. S. Agr. Dept. Plant 



Indus. Bur. Bul. 206 : 7-78. 1911. 

 Spaulding, P. European currant rust on the white pine in America. 



U. S. Agr. Dept. Plant Indus. Bur. Circ. 38 : 1-4. 1909. 

 Stewart, F. C. An outbreak of the European currant rust. New York 



(Geneva) Agr. Exp. Sta. Tech. bul. 2 : 61-74. 1906. 

 Atwood, G. G. Emergency bulletin on the blister rust of pines and the 



European currant rust. New York State Agr. Dept. Hort. bul. 



2 : 1-20. 1909. 



Stewart, F. C., and Rankin, W. H. Does Cronartium ribicola over- 

 winter on the currant? New York (Geneva) Agr. Exp. Sta. Bul. 



374:41-53. 1914. ' 



ANGULAR LEAF-SPOT 

 Caused by Cercospora angulata Winter * 



This leaf-disease of currants is common in Iowa and New 

 York. It is also found in Ohio, Michigan, West Virginia, 

 Maryland, Nebraska, Wisconsin and Rhode Island. In some 

 years it is very destructive. 



The spots produced by Cercospora angulata are readily 

 recognized. On the upper surface of a leaf the spots are of a 

 paler color than the surrounding healthy tissue. The under 



