2i)L' YAJiT) AND GARDEN 



Tlie insects may be combated with success if. 

 the battle is begun in time. Borers, infesting 

 tlie solid wood, tunneling and cutting it into 

 channels; sucking insects, puncturing the skin 

 of leaves, fruit, twigs or roots and withdraw- 

 ing the juices ; chewing insects, devouring the 

 substance of leaves and other parts of the tree 

 — all these can be exterminated bj' the use of 

 poisons, sprayed or fumigated, or by the em- 

 ployment of mechanical means. The borers 

 must be dug out, but the chewing insects may 

 be killed l)y spraying poison^Paris green or 

 arsenic of lead, for instance — on their food. 

 The sucking insects are killed by spraying 

 with kerosene and water, made into an emul- 

 sion, with whale-oil soap or with a mixture of 

 lime and sulphur in solution. These sprays 

 choke or smother the insect or so injure the 

 bodv wall that the tree enemv succumbs. 



