3o8 



Bulletin 262. 



cent of the orchards are more or less infested. The records show that 

 within these bounds only forty-three orchards have been sprayed with 

 solutions to kill the scale. Lime and sulfur has been used more than 

 any other spray, although Scalecide and crude oil have been tried with 

 some degree of success in about one-third of the orchards. Observa- 

 tions, however, tend to show that lime and sulfur should be adopted 



Fig. 37. — Lime and siil/iir, an effective spray for San Jose scale. Left side of tree 

 sprayed, right side unspraycd. In orchard of Ermon Shippcy, Youngstown 



as the standard spray for scale. The formula for lime and sulfur now 

 recommended for use is : 



Lime 20 pounds 



Sulfur (flour or flowers) 15 pounds 



Water 50 gallons 



The preparation of this mixture involves careful attention to several 

 particulars. The essentials briefly stated are as follows : Take the 

 total quantity of sulfur to be used and make a thick paste with water. 

 Heat in a cooking receptacle about one-third of the quantity of water 

 required, ^^'hen this water is hot, add all the lime and all the sulfur 



