3i8 



PLANT DISEASES 



favoured by the dispersion of the dropped-out portions of 

 the leaf bearing conidia. 



Preventive Means. — Spray with ammoniacal solution 

 of copper carbonate, the first time just when the leaves 



Fig. 86. — Cercospora circumsclssa. i, peach leaf diseased ; 2, cluster 

 of conidiophores bearing conidia, x 400. 



are expanding, and repeating at intervals. Bordeaux mix- 

 ture should not be used for peach or almond, as the leaves, 

 and even young shoots, are injured by dilute solutions. 



Pierce and Ga\\ovta.Y, /ourn. Mycol., vol. vii. p. 66, 4 pi. 

 (1894). 



