14 



FARMERS BULLETIN 831. 



plants ill tall cotton where the platform pmiip would be undeskable. 

 The most economical outfit for a severe case comprising several acres 

 consists of a barrel pump carried through the field on a wagon or 



specially constructed vehicle of 

 some sort. Figure 11 is from a 

 photograph of a portable outfit 

 used very successfully in demon- 

 stration work in North Carolina. 

 It consists of a platform built 

 upon the axle and shafts of a dis- 

 mantled hayrake. The wheels are 

 large, bringing the axle well above 

 the ground, so that the vehicle 

 does very little damage to the 

 plants. Skice the gauge of the 

 outfit is 8 feet, it straddles two 

 cotton rows, the single draft ani- 

 mal w^alking in the middle between 

 these rows. A barrel pump with 

 a capacity of 50 gallons is mounted on the platform. A boy drives, ■ 

 one man pumps, and two men handle the two sprayers. Thorough A 

 treatment of 4 acres per day is readily obtamable with these devices. 



NECESSITY FOR THOROUGH SPRAYING. 



Some dissatisfaction has been experienced among certain planters 

 who have undertaken to check the ravages of the red spider by 

 spraying. With pests which devour the entire leaf, such as potato 



Fig. 10.— Kiiapsack sprayer. (Quaintance.) 



Ideal spraying outfit for treatment of considerable red-spider infestation. 



