226 AGRICULTURE 



pores in the leaves of plants. Once inside the fruit 

 or leaf, they grow and nourish themselves by absorb- 



FIG. 154. RESULTS OF SPRAYING FOR LATE BLIGHT OF IRISH POTATOES 

 The plants in the center were not sprayed ; those on both sides were sprayed. 



ing the food material formed by the green plant. They 

 steal the food which the plant had prepared for its own 

 use. 



