Propagation by Grafting. 



227 



are usually inserted (Fig. 114), to increase the chances 

 of success. The elasticity of the stock should exert 

 sufficient pressure to maintain very close contact be- 



tween it and the 

 tightly bound 

 The cions should 

 yond the end of 

 cut is usually 



cion; otherwise it should be 

 with cord or raffia (393). 

 contain at least one bud be- 

 the stock. The wedge-shaped 

 made about one inch long, 

 and the cion should be in- 

 serted into the cleft as far 

 as the length of the 

 wedge, after which all 

 the exposed wounded 

 J/j3 I if surfaces, including 



FIG. 112. Grafting 

 chisel for making 

 the cleft in cleft- 

 grafting. The point 

 at the right is for 

 holding the cleft 

 open during inser- 

 tion of cions. The 

 projection above is 

 for driving this 

 point in or out; one- 

 fifth natural size. 



PIG. 113. FIG. 114. FIG. 115. 



FIG. 113. Cion shaped ready for insertion 

 in cleft. (After Bailey.) 



FIG. 114. Cions inserted in cleft, ready 

 for waxing. 



FIG. 115. Cross-section of Fig. 113 (Af- 

 ter Maynard). C, cambium layer of stock; 

 C', cambium layer of cion. The cambium 

 layers of the outer edge of the cion should 

 form a continuous line with that of the 

 stock. The cion is made a little thinner 

 at its inner edge to permit the pressure of 

 the stock to be exerted at the outer edge. 



the distal end of the cion, should be coated with graft- 

 ing-wax (387). 



Cleft-grafting is most used in top-grafting old trees. 

 Four to six of the main branches, located as nearly 



