for the bark to slip. However, when the scions for bridge and 

 cleft grafting or the nursery tree for inarching are kept dormant 

 in storage, grafting can be successfully done even though the 

 trees have made considerable growth. 



Selection of Scion Wood for Bridge Grafting 



It usually is necessary to obtain scions in advance of their 

 use in order to have them dormant. Water sprouts or well-ripened 

 one-year terminal growth make good scions for bridge grafting. 

 Scions can vary in size from that of a lead pencil to one-half 

 inch in diameter, the largest scions being used on larger wounds. 

 Scions may be taken from the same tree or any other available 

 compatible sort, but preferably from a winter hardy variety such 

 as Cortland or Mcintosh apple. 



Trees for Inarching 

 Use dormant nursery trees 3 to 6 feet in height. 



Mechanics of Repair Grafting 



Farmers' Bulletin Number 1369 of the U.S. Department of 

 Agriculture gives detailed instructions for bridge grafting and 

 inarching. A limited supply of this publication is available at 

 your County Extension Service. Also available from your County 

 Extension Service is our publication on cleft grafting. 



Grafting Compound 



For the protection of grafting wounds, many growers now use 

 asphalt emulsion instead of a grafting wax. It can be obtained 

 from most distributors of farm and gardening supplies. Asphalt 

 emulsion should be applied on the tip ends of the scions and the 

 cut stub of the trunk when cleft grafting, and over the area where 

 the scions or top of the inarched tree meets the stock of the 

 girdled tree. Applying the emulsion on the injured section of the 

 trunk is also advisable to prevent weathering. 



The Number of Scions 



The following are about the right number of scions for dif- 

 ferent sized trees: 



(1) Tree 2 inches in diameter, 3 scions 



(2) Tree 3 inches in diameter, 4 scions 



(3) Tree 6 inches in diameter, 6 scions 



(4) Tree 10 inches in diameter, 8 or 10 scions. 



On partially girdled trees use a proportionate number of 

 scions. A tree one-quarter or more girdled should be bridge grafted, 



