248 PRACTICAL TREE REPAIR 



thus giving fungi a better opportunity to gain en- 

 trance to the trunk. 



The beech does not react well to the severe 

 pruning system of rejuvenation, unless the re- 

 maining framework is well clothed with twigs. 



BIRCH 



One of the problems in connection with work 

 in the white-barked birches (as well as other 

 genera which have white or light bark) is the 

 avoidance, in so far as is possible, of disfiguring 

 applications, such as tar and asphalt. On such 

 trees white-lead paint of the right color should 

 be used, if the tree is conspicuously placed. 



Arboriculturists are frequently asked what can 

 be done about the ugly black scars which result 

 from peeling off rings of the white outer bark. 

 There is no cure for such a wound. An applica- 

 tion of varnish immediately after the infliction of 

 the injury might prevent to some degree the 

 cracking of the exposed inner bark. The black 

 band can of course always be painted white, which 

 is advisable, especially when the tree, though 

 within view, is sufficiently far away to prevent the 

 patching from being too conspicuous. 



CATALPA 



The globular catalpa, Catalpa Bungei, which 

 is so much in vogue just now, often breaks to 



