BUD GRAFTING 



259 



scion 



lively by grafting. Every possible tree of the same or closely 

 related species may be made use of in grafting. If a tree is found 

 to produce inferior fruit, instead of uprooting it and planting new 

 seeds, a scion from a tree that produces good fruit may be grafted 

 on the inferior tree. If the grafting is successful, the original tree 

 will, in the future, produce the 

 improved variety. Varieties of 

 the Old World grape have been 

 grafted on the stock of the wild 

 grape, and from this combination 

 we have obtained the different 

 types of grapes found in our 

 country to-day. The roots of 

 the Old World grape are easily 

 injured by a root louse, but 

 the roots of the wild grape are 

 not affected by this insect. Be- 

 sides, the wild grapes are hardy 

 and are able to grow well in this 

 climate. By grafting, it has been 

 possible to produce grape vines 

 that are immune from destruc- 

 tion by the louse, and yet yield 

 the desired type of grape. 



A type of grafting is fre- 

 quently used by surgeons in ani- 

 mals. But, here, grafting is a type of regeneration and not of re- 

 production. In most cases, grafting is only used when tissues are 

 severely injured. For example, if considerable skin has been de- 

 stroyed by a burn, small sections of skin are removed from other 

 parts of the body and grafted on the injured area. This grafted skin 

 grows over the injured area and thus repairs the tissue. If a bone 

 in the body is tubercular, sections of healthy bone from another 



stock 



Tongue grafting is a type commonly used. 

 The important feature here, as in all grafting, 

 is to bring the cambium layers of stock and 

 scion together. 



