PART II. 



SPECIFIC DIRECTIONS FOR SPRAYING 

 CULTIVATED PLANTS. 



ALMOND. 

 FUNGOUS DISEASES. 



Leaf Blight; Almond Disease (Cercospora circumcissa, Sacc.). 

 Description. This disease is especially serious in California, 

 the trees often being practically defoliated during the summer. 

 The fungus attacks the leaves and the stems. Upon the 

 former it produces small circular spots, the diseased areas 

 being more or less restricted by the small veins of the leaves. 

 The spots are about an eighth of an inch in diameter, and 

 upon the death of the tissue the discolored areas fall from the 

 leaves, causing an appearance similar to that of the shot-hole 

 fungus upon plum foliage. Diseased steins also show distinct 

 spots of circular or oval outline. The dead tissue soon falls 

 out, producing a pitted appearance on the surface of the af- 

 fected twigs. 



Treatment. N. B. Pierce, who has thoroughly studied this 

 disease, recommends spraying the trees with the ammoniacal 

 carbonate of copper, making the first application before the 

 trees bloom, the second when the trees are in full leaf, and 

 the third four weeks later. 1 



1 Galloway, Ann. Rep. U. S. Com. of Agric. 1892, 232. 



239 



