519 



The accompanying figure illustrates the effect produced by the 

 tieatmtnt. 



Shot Hole on Apricot. The healthy growth took place since spraying. 



Remedies. Burn leaves as soon as they fall. Bordeaux Mix- 

 ture, half strength, or aminoiiiacal carbonate of copper applied 

 several times during the season, beginning as soon as the leaves 

 appear. 







CITROUS TREES. 



Trees of this species are subject to a number of diseases, the 

 most serious of which are 



GUMMING, COLLAR ROT, MALDI GOMA. A serious contagious 

 disease of stone fruit and citrous trees, (pp. 511-516, under twig 

 blight and gumming of stone fruit.) It seems to be a cracking in 

 the bark and an exudation of the gum, which runs down the tree 

 and affects the bark underneath. Abrasion of the bark with the 

 hoe, plough, and other field implements, deep planting, defective 



