CITRUS FRUITS 



119 



removed and burned. Spray with Bordeaux mixture, 

 until the fruit is near maturity, and then use the ammo- 

 niacal solution of copper carbonate. Lastly, spray the 

 fruit just before gathering, or wash after gathering with 

 potassium sulphide wash or ammoniacal solution of 

 copper carbonate to prevent rot before marketing. 



FIG. 53. Leaves of lemon affected with scab, Cladosporium citri. 



Ill 



The character of the treatment must be varied 

 accordance with climate and local conditions. 



Scab. This disease (Fig. 53) is due to the fungus 

 Cladosporium citri^. & F., and occurs abundantly on the 

 sour orange, lemon, mandarin, pomelo, rather sparingly 

 on the sweet orange, shaddock, and other citrus fruits. 

 It has been reported from Cuba, Porto Rico, Hawaii, 

 Japan, Australia, and the United States, but no doubt 



