TT IS ESTIMATED that the potato crop of the country is 

 reduced each year more than 100,000,000 bushels as the 

 result of injury by insects and diseases. If spraying were 

 not practiced, this loss would be much greater, but even at 

 the present time spraying is not practiced as widely or as 

 thoroughly as it should be, and the present crisis siiould 

 impel all growers to increase their crops by preventing these 

 enormous losses. 



This bulletin tells how to control the Colorado potato beetle 

 and late-blight (the wonst two enemies of the potato), blister 

 beetles, flea-beetles, cutworms, and other caterpillars, leaf- 

 hoppers, " aphis " or plant-lice, early-blight, and other foliage 

 diseases. 



For most of these insects and for the diseases discussed in 

 this bulletin, spraying with Bordeaux mixture and arsenate 

 of lead is recommended, but for leafhoppers and plant-lice, 

 contact sprays, such as nicotine sulphate and emulsions, are 

 the best. For blight, Bordeaux mixture is an efficient means of 

 control. Directions for preparing and applying these sprays 

 are given. Other methods of control described in this bulle- 

 tin, such as jarring and driving, together with crop rotation 

 and clean cultural methods, also help considerably in pro- 

 tecting the crop. 



The best spraying outfits available should be procured. 



