SMALL FRUITS 



151 



Here even the ap- 

 parently healthy 

 plants may be af- 

 fected. After the 

 disease has once 

 gained access to a 

 field, all diseased 

 plants should be 

 pulled and burned 

 as soon as they 

 are recognized, 

 and the soil should 

 be allowed to rest 

 some years before 

 again putting 

 either currants or 

 gooseberries upon 

 it. 



Cane blight 

 (Fungus indet.). — ■ 

 A sudden wilt of 

 the leaves on one 

 or more canes in a 

 bush is the first 

 symptom of dis- 

 ease. The entire 

 bush may suc- 

 cumb, but not usu- 

 ally during the first season. Upon sphtting the stems 

 a discoloration of the bark and wood near the base is 

 noticed. This disease, while similar in many of its symp- 



FiG. 63. — Diseased currant canes ; a, Tubercularia ; 

 6, Nectria ; c, Pleonectria. After Durand. 



