146 



AGRICULTURE FOR BEGINNERS 



of their origin, and of their prevention a necessary part of 

 a successful farmer's training. Tillage alone will no longer 

 render orchard, vineyard, and garden fruitful. Protection 

 from disease must be added to tillage. 



In dealing with plants, as with human beings, -the 

 great object should be, not the cure, but the prevention 



FIG. 140. INCREASING THE YIELD OF FRUIT 



of disease. It is far too costly to wait for disease to 

 develop and then to attempt its cure if the disease can 

 be prevented. 



EXERCISE 



How many chinch bugs can you find in winter condition? Are 

 they worse in wet or dry weather? On what crops are they found? 



How does the squash bug resemble the plant louse? Is this a 

 true bug? Gather some eggs and watch the development of the 



