Propagation by Grafting. 



217 



cambium of the thicker edge of the cion forms a line 

 with the cambium of the stock (Figs. 113, 114, 115). 

 Success is promoted if the wedge-shaped portion of the 



bud on its thicker edge. When 

 an inch in thickness, two cions 

 serted (Fig. 114), to increase the 

 cess. The elasticity of the stock 

 ficient pressure to maintain very 

 close contact between it and the 

 cion; otherwise it should be 

 tightly bound with cord or raffia 

 (393). The cions 

 should contain at least 

 one bud beyond the 

 end of the stock. The 



cion contains a 

 the stock exceeds 

 are usually in 

 chances of sue 

 should exert suf 



FIG. 112. Grafting 

 chisel for making the 

 cleft in cleftrgrafting. 

 The point at the right 

 is for holdi ng the cleft 

 open during insertion 

 of cions. The projec- 

 tion above is for driv- 

 ing this point in or 

 out; one-fifth natural 

 size. 



FIG. 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 (After May- 

 nard). 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. 



wedge-shaped cut is usually made about one inch long, 

 and the cion should be inserted into the cleft as far as 

 the length of the wedge, after which all the exposed 

 wounded surfaces, including the distal end of the cion, 



should be coated with grafting- wax (387). 

 13 



