62 



PRUNING 



134. Pruning is sometimes employed to increase the vigor 

 of weak or injured plants, and to renew and reshape old trees. 

 Woody plants severely injured by frost are often cut back 



106. Raspberry before pruning. 



107. Same bush after the 

 spring pruning. 



heavily to fresh clean wood. (Fig. 108.) The vigor of the 

 plant is condensed into a smaller area, new shoots arise, and 

 a renewed top may be formed. 



135. In pruning, all long stubs should be avoided, and 

 the cut should be smooth and not splintered. The "healing" 

 of such a wound is merely the covering of the stub or cut 

 area by a callus or ring of tissue that arises from the cambium 

 region (between wood and bark); this callus does not form 



readily on long 

 and leafless 

 stubs. An un- 

 covered wound 

 tends to rot, and 

 a hole is formed 

 into the tree. 

 Figs. 109 and 110 

 show poor and 

 good pruning. 



108. Peach trees heavily cut back after a freeze. The limb should 



