THE CURRANTS 



burrows in the canes, eating out the pith. The 

 canes are greatly weakened and fruit produc- 

 tion declines. Borers are combatted best by 

 cutting out and burning the weak canes each 

 spring. 



Currant Aphids — These tiny sucking in- 

 sects cluster on the under sides of the leaves 

 and cause them to curl, producing blister-like 

 areas which often have a reddish tinge and are 

 very conspicuous. They may be controlled 

 by spraying the under sides of the leaves, or 

 by dipping infested branches in a solution of 

 40 per cent nicotine sulphate, one to eight 

 hundred parts of soapy water. 



Anthracnose — This disease appears as 

 small brownish spots scattered thickly over 

 the upper surfaces of the leaves. Later the 

 leaves turn yellow and finally drop, some- 

 times before the fruit is harvested. The plants 

 are greatly weakened. 



Anthracnose is combatted by spraying, in 

 spring before the leaves start, with liquid lime 

 sulphur one to ten, and during the growing 

 season with 4-4-50 Bordeaux mixture. Spray- 

 ing just before harvest time should be avoided, 

 for Bordeaux will discolor the fruit. 



White Pine Blister Rust — This disease, 

 so destructive to the five-leaved pines, must 

 spend a part of its life cycle on the currant or 

 105 



