Insects in the Garden 



To hand-pick successfully, the plants should be searched 

 repeatedly, beginning as soon as signs of the insect are 

 seen. 



(3) Use of poisons. Poisons are often used to kill 

 chewing insects, and for some insects the use of a poison 

 is the best means of control. How to mix poisons and 



U.S.D.A. 



FIG. 175. Map showing the rapid spread of the cabbage butterfly. It first 

 appeared at Quebec in 1860, and, spreading southward and westward, by 1881 it 

 was found over half the continent. 



