ORCHARD PLAISTS 109 



125 pounds nitrate of soda may be added in 

 addition. 



"In order to get the greatest returns from this 

 fertilizer it should be thoroughly worked into the 

 soil. This can be accomplished very well by ap- 

 plying it to the surface just before plowing. The 

 plowing and working of the ground will get the 

 fertilizer pretty thoroughly incorporated, and 

 the tree will soon show the beneficial effect of its 

 presence. Hoe the ground often and keep it 

 cultivated until midsummer, then sow a cover 

 crop that will protect the ground until it is 

 turned under the following spring." 



After these reformatory measures have been 

 carried out, it remains to guard the trees against 

 the attacks of insects with some protective spray. 



The particular insect or fungus-destroying 

 mixture required will, of course, depend upon 

 the individual case. The Bordeaux mixture is 

 doubtless used more than any other single spray 

 for fungous diseases and for the codling moth 

 in apples. A lime-salt-sulphur solution is the 

 general mixture for San Jose scale. In general, 

 it should be recalled that spraying is a preventive 

 measure rather than a cure. Bordeaux mixture, 

 for example, will prevent the appearance of the 

 fungus disease commonly called scab. The 

 attacks of the codling moth may be met in the 



