Symptoms 



show a purplish discoloration of the bark 

 about a wound. Canker due to Ooniothyrium 

 Fuckelianum. Cut out and bum affected stems. 

 Spray plants with Bordeaux mixture (7), and 

 paint over all woxmds (5). 



Dead areas appear around buds or on long 

 strong shoots due to Botrytis cinerea attack (see 

 Gooseberry). 



Bright orange patches of spores appear on 

 the stem in spring — ^rust, see below. 



Foliage. — ^Dusty white patches on leaves 

 and near tips of young growths. Foliage is 

 crumpled and fails to expand. White felted 

 patches on stems in winter. MUdew, due to 

 SphaerotJieca pannosa. Dust plants with flowers 

 of sulphur, or spray with liver of sulphur (7). 

 Prune away all trace of the fungus in spring (3). 



Black roundish blotches on upper surface 

 of leaves, with branching threads radiating 

 from them. Leaves fall after turning yellow 

 prematurely. Destroy fallen foliage (2). Spray 

 from May onwards with Bordeaux mixture 

 (7). Yellow spots closely scattered over lower 

 surface of leaves, followed by brown and black 

 spots. Foliage sometimes falls early. Rust 

 due to Phragmidium subcorticium. Collect and 

 bum fallen leaves. Spray with potassium 

 permanganate (7). 



Irregular pale brown spots extending rapidly 



