172 Lessons in Fruit Growing. 



late in summer and during autumn — especiallj'- on plan- 

 tations more than one year old. The first symptom is the 

 formation of small, purple spots, which increase in size to 

 an eighth or a quarter of an inch in diameter. The purple 

 color soon changes to clear, reddish-brown, which becomes 

 still lighter as the season advances. The edges of the 

 spots, however, generally remain purple. The fungus passes 

 the winter by a mycelium contained within the leaves, as 

 well as by spores. 



Treatment. Burning the foliage after the fruiting sea- 

 son, as recommended for the strawberry leaf-roller (257), 

 generally prevents serious damage from this disease. 



264. The Strawberry mildew [Sphcerotheca castagnei) 

 attacks both the berries and the leaves, covering them with 

 a thin net of mycelium resembling delicate cobwebs. The 

 affected leaves fold up on the midrib and appear as if suf- 

 fering from want of water. The disease is thought to be 

 most serious on poorly-drained ground. 



Treatment. Sprinkle flowers of sulfur upon the foliage 

 and between the plants as soon as the symptoms appear; 

 or spray unfruiting plants with Bordeaux mixture. 



SUMMARY OF THE TWO PRECEDUSTG SECTIONS 



1. The groselles include the currants and gooseberries. 

 While these are very hardy shrubs, they respond liberally 

 to good treatment, and thrive best in a deep, rich, moist 

 soil, with thorough tillage or mulching (232, 233). 



2. The groselles may be planted at the same distances 

 as the bramble fruits (234). They are pruned by thinning 

 out the older branches (235). 



3. The currants are chiefly used for jelly and preserves. 

 Tlie}^ are propagated from cuttings, which may be planted 



