ACCIDENTS AND DISEASES 199 



disease-infested leaves should be collected and 

 burned as they fall in the autumn. 



Thorn. The foliage is attacked by several 

 insects, and the stems tunnelled by the grub of 

 the goat moth. Cyanide of potassium injected 

 into the holes is a good remedy for the latter, 

 while spraying with " XL All " insecticide 

 will clear the foliage of insect pests. Old 

 trees suffer from root rot, and in consequence 

 often fall a victim to the storm. 



Tulip Tree. During stormy weather, 

 heavily-foliaged branches of the tulip tree are 

 apt to be wrenched from the stem, an evil 

 from which some of the finest specimens in 

 this country have suffered. Bracing is recom- 

 mended. Fungus is apt to attack the roots of 

 lawn trees that have been damaged by the 

 mowing machine, but this can be remedied 

 by cutting away the diseased portions and 

 painting with tar. Trunk hollows sometimes 

 appear, and should at once be filled with 

 concrete, so as to prevent the ingress of damp 

 and consequent rotting of the stem. 



Walnut falls a prey to red and white rot, 

 often becomes hollow, and loses the vitality of 



