82 WILSON & TOOMER FERTILIZER COMPANY 



Chapter XIV 



Spraying 



Since too much emphasis cannot be laid upon this 

 point, I will repeat: Careless spraying is a waste of 

 time and money. 



How to Spray Cover the foliage with a thin film and 

 stop just at the point where drops would be formed to 

 run off. An excess wastes the spray, leaves the surface 

 unprotected since the solution runs off instead of form- 

 ing a film, and perhaps causes injury to the plant tissues 

 at the points where drops hang suspended instead of 

 falling, for when thus evaporated there is often enough 

 of the concentrated solution to "burn" the vegetation. 



Where to Spray Study the insect or disease which is 

 to be controlled and direct the spray accordingly. If 

 the attacked area is the under surface of the leaves great 

 care must be taken to have the work effective. 



When to Spray Never spray liquid in hot sunshine, 

 as the leaves are often injured by the moisture being so 

 heated as to scald them. This is also likely to happen if 

 a light shower comes just after the spraying and the sun 

 comes out hot for several hours afterward. While one 

 cannot foresee the weather with certainty, he can gener- 

 ally judge it quite accurateh T for a few hours in advance. 

 The ideal condition for spraying is a slightly cloudy day 

 with a light breeze which will rapidly dry the foliage, 



