16G 



ELEMENTARY AGRICULTURE 



before they are planted, the formalin will kill the 

 scab growth without injuring the potatoes. One- 

 half pint of formalin to fifteen gallons of water 

 makes a proper solution, which will do for several 

 bushels of potatoes, as it can be used over and over 



The Blight. Another disease for the potato farmer 

 to guard against is the blight. This is a tiny plant 



Courtesy of Agricultural Experiment Station, Wisconsin 

 Fig. 90. A -field of potatoes yielding 35.0 bushels per acre. 



or fungus growth which attacks the plant above 

 ground. The blight sometimes destroys a crop com- 

 pletely. Spraying is the remedy for this enemy, 

 also. 



Harvesting. Early varieties of the potato are dug 

 as soon as they are big enough for market. Late 

 potatoes are left in the ground until the vines are 



