INSECT ATTACKS AND REMEDIES 135 



been attacked. Satisfactory results have been 

 so obtained^ and trees that were pruned ex- 

 perimentally three years ago have, so far, been 

 subjected to no further attacks of the insect. 

 It is, however, a slow and tedious process that 

 can only be extended to lawn trees or such as 

 are valuable from their ornamental appearance 

 or associations. 



The caterpillar of the cabbage moth 

 (Memestra oleracea] attacks the leaves of the ivy, 

 and is particularly destructive in London and 

 the suburbs. During the autumn months the 

 leaves of infested plants are eaten to the mid- 

 rib and wear a most unsightly appearance. 

 Syringing with " XL All " insecticide or 

 dusting with hellebore will effect a cure. 



The Ash Bark Beetle (Hy le sinus fraxini). 

 Ash trees that are growing in unsuitable soil 

 most often fall a prey to this beetle, which is 

 commonly distributed all over the country. 

 Healthy poles are also attacked, but the main 

 depredations are confined to such trees as are 

 in an unhealthy condition, whether from old 

 age or unsuitable surroundings. 



About the beginning of May, the beetles, 



