i86 TREE WOUNDS AND DISEASES 



branches are common on the acacia, and it is 

 liable to fungoid attacks. The timber is of 

 good quality, and lasts well either in or out 

 of doors. On gravelly soils the tree dies 

 out at an early age. 



Alder does not suffer from insect attacks, 

 though the larvae of one of the weevils, by 

 burrowing into the wood, does a certain 

 amount of damage to the timber. It is by 

 no means a long-lived tree, and when grown 

 on unsuitable soil, or in too cold situations, 

 becomes stagheaded. The timber, which is of 

 a beautiful pink colour, is valuable for using 

 under water and for the making of clog soles. 



Apple. Fruit trees in general, but the 

 apple in particular, are subject to many dis- 

 eases, including canker, insect and fungoid 

 attacks, and various forms of blight. Canker 

 is perhaps most to be dreaded, though insect 

 attacks, especially those of the codling and 

 winter moths, have played sad havoc in many 

 of our English orchards of late years. The 

 attacks of at least four species of fungi have 

 also, particularly in old and neglected orchards, 

 to be contended with ; while boring beetles 



