HOW TO FIGHT POTATO ENEMIES. t)l 



HOW TO SPRAY. 



Spraying is an effective method of applying insecticides and 

 fungicides. To obtain the best results, the material must be 

 applied forcibly in the form of a fine mist, not in coarse drops 

 sprinkled over the foliage. Inasmuch as spraying is a preven- 

 tive measure (not a cure) the whole surface of the plant must, 

 so far as possible, be covered. 



THE APPARATUS. 



The necessary apparatus consists of a force pump, hose, noz- 

 zles, a barrel for holding the spraying mixture and a wagon for 

 carrying all. 



The Pump: The pump should be large enough to easily sup- 

 ply 4 double nozzles and should have as an accessory a good 

 agitator. The small bucket pumps and knapsack sprayers do 

 very well for a few plants in the kitchen garden, but for field 

 work they are unsatisfactory. All parts of the pump that are 

 subject to wear should be made of brass and should be carefully 

 adjusted. The pump and all other apparatus should be thor- 

 oughly washed every time after using. 



The Hose : In case an automatic sprayer is not used, 2 pieces 

 of 1-2 inch hose 10 to 20 feet long are needed. 



The A T oz.?:le: There are many good nozzles, but the best tried 

 at the Experiment Station, are the Vermorel, sold by most deal- 

 ers in spraying apparatus ; the McGowen, made by John J. Mc- 

 Gowen, Ithaca, N. Y., and the Bordeaux, made by the Deming 

 Company, Salem, Ohio. The Vermorel throws a finer spray 

 than the others, and is the best for potatoes, but is easily clogged 

 unless the spraying mixture, is carefully strained through cheese- 

 cloth or a fine wire screen before using. With automatic spray- 

 ers, double nozzles should be used. 



The Barrel: A kerosene barrel, holding about .fifty gallons, 

 is a convenient tank. It can be placed upon the side or stood on 

 end, but the first position is preferable. A small opening should 

 be made in which to place the pump, and another, larger one, 

 through which to fill the tank and stir the mixture. 



The Wagon: Any low wagon, or even dump-cart will answer 

 the purpose. For convenience in turning, a two wheeled cart is 

 to be preferred. 



