7^ 



SPRAYING CROPS 



erally reveals one or more blackish points consist- 

 ing of the fruiting spores of the fungus. It is by 

 means of these that it passes the winter, and propa- 

 gates itself. The affected leaves often turn yellow 

 and fall oft'. 



Remedies — It has been definitely proven that these 

 diseases may largely be prevented by spraying. A 

 treatment similar to that recommended for apple-scab, 

 one spraying with dilute Bordeaux mixture before 

 blossoms open, then two or three sprayings with Bor- 

 deaux mixture having an excess of lime and one of 

 the arsenites after the fruit forms, is the most prom- 

 ising treatment for both insect and fungus pests. It 

 may be necessary to make one or two late sprayings 

 with a carbonate of copper solution in case rot sets in. 

 The mummied plums should be picked oft* and burned 

 in the winter : and an early spring spraying with 

 simple solution of copper sulphate, applied before the 

 buds swell, is very beneficial. The Japanese plums are 

 verj^ sensitive to sprays, but they are less liable to 

 these diseases. 



