PLATE 12. Don't trust to the general appearance of your plants to de- 

 termine whether they are free from insect pests. Examine the under 

 side of the leaves frequently and you may discover a condition like that 

 in the picture above where the white fly has had a strong start with- 

 out giving any indication of its presence to the casual observer. (Lower} 

 A compressed air sprayer of the shoulder strap type like that shown 

 herewith is most convenient and will take care of a large amount of 

 spraying. Get an angle nozzle with your outfit. 



