-6- 



Selection of Scion Wood for Brid^ je Grartlng 



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 growths 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 wouj^. 

 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. 



Seedlings for Inarching 



Use dormant small seedling or nursery trees 3 to 6 feet in height. 

 Mechanics of Repair Grafting j[^y,,nJj^ v^vm/*'^^ 



Farmers' Bulletin #1369 U. S. Department of Agriculture give in detail methods 

 of bridge grafting and inarching. A -e^y of this publication can be obtained 

 from the EwwA^y Department, University of liassachusetts, Amherst or from your 

 County Extension Service, 



^^^"^''^ 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 exposed edges of the bark on the trunk when bridge grafting is com- 

 pleted. Applying the emulsion on the injured section of the trunk will prevent 

 weathering. 



The Number of Scions 



The follwing are about the right number of scions for different sized trees: 



(1) Tree 2 inches in diameter, 3 scions 



(2) Tree 3 inches in diameter, \x scions 



(3) Tree 6 inches in diameter, 6 scions 



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



On partially girdled trees use a proportionate number of scions. Tree one- 

 quarter or more girdled should be bridge grafted. 



Care of Scions After Grafting 



It is necessary to keep the scions from producing shoots . As buds on the 

 scions swell, rub them off. 



General Considerations 



1, As soon as the injury is discovered, it may be possible to save some of 

 the cambium layer cells by promptly applying the asphalt emulsion or grafting wax. 



