Pests and Diseases 



lars of the treatment may be obtained from the 

 leaflets. 



Quassia chips and nicotine are both used with soft 

 soap as " contact " washes, and there is no doubt 

 that nicotine is by far the best and safest poison for 



FIG. 30. The Green Fly (Aphis] or Plant Louse (en- 

 larged) : the Glauciis Leaf Weevil (enlarged], and Caterpillar 

 and Egg-band (on young shoot of apple] of lackey moth. 



this purpose, but it is somewhat expensive at present 

 and we must hope that tobacco will some day be 

 grown in this country on a large scale, so that it 

 may be used as an insecticide. (See Appendix II.) 

 Various scale insects attack certain fruit trees 

 and bushes, and caustic soda is used for these, 

 sometimes together with paraffin, in winter time. 



