234 



GRAFTING 



Tongue Grafting. -- This method is the same as splice 

 grafting except that a vertical cut is made along the diagonal 

 cut in both stock and scion to form a tongue. When the 

 tongues are inserted or pushed together they not only 

 expose more of the cambium but also exert a binding force 

 and a better union is insured. The graft should be wound 



with waxed cloth or cord 

 as in the splice graft. 

 This method is univer- 

 sally used in root graft- 

 ing. Seedling stocks with 

 long straight taproots 

 are desirable for this 

 purpose. In whole root 

 grafting, the entire root 

 is used with each scion. 

 In piece root grafting 

 each root is cut into two 

 or more pieces. 



Root grafting is used 

 to propagate many of 

 the apples, pears, and 

 other pomaceous fruits. 

 This form of grafting has 

 an advantage over bud- 

 ding in that it is usually done indoors during the winter, 

 while budding must be performed during the growing season. 

 Both scions and roots are collected in the late fall and 

 stored in sand, sawdust, or moss, in a cool place. About 

 January or February the stock is grafted. The complete 

 grafts are wrapped tightly with waxed string or cloth and 

 stored in a cool, moist place until spring. Callusing will 



Fig. 127. Tongue grafting: (a) the scion; 

 (b) the stock ; (c) stock and scion united ; 

 (a) graft wrapped. 



