82 mains: agricultural experiment station. 1903. 



on ornamental trees are the same as those which have heretoiore 

 been recommended for use in the orchard, vi::.: (i) Paris green, 

 I pound; Hme, 6 pounds; water, 100 gallons; or (2) arsenate of 

 lead or Disparene, 6 pounds; water, 100 gallons. The lime is 

 added to the first formula to prevent injury of the foliage by the 

 Paris green, and should in no case be omitted. The lead arsen- 

 ate acts slower as a poison than does Paris green, but it adheres 

 to the foliage better. It is important that spraying be done at 

 once when the attack of canker-worms is discovered, as the 

 insects are much more difficult to kill as they increase in size. 



If more explicit directions for spraying are desired, send to 

 the Experiment Station for directions "How to Fight Apple 

 Enemies." 



