612 XEW JEESEY AGEICULTUEAL COLLEGE 



July 21st, Mr. Dickerson made a. critical comparison and found 

 little difference in effect between the lime, sulpliur and soda and the 

 lime and sulphur dust. There was a little advantage for the soda 

 combination, but not a great deal. The infestation was not bad in any 

 case, and both combinations destroyed insects enough to carry the trees 

 safely through the summer. 



The sulphur supply in this case was the dust swept from the beams 

 of the works, where it had settled, and was an almost impalpable 

 powder, much finer than the "flowers." The experiment has little 

 practical bearing, but does indicate that no actual chemical combina- 

 tion with lime is needed to produce an insecticide effect. 



liime and Salphur, Self-Boiled. 



The results of the self -boiled lime and sulphur combinations, so far 

 as I saw them in previous years, were so unsatisfactory that I could 

 not recommend them. What I saw in June, in the peach orchards of 

 Mr. A. N. Brown, at Wyoming, Del., and afterward in the apple and 

 pear orchards of Mr. E. S. Holmes, at Eiverton, IST, J., has convinced 

 me that, with proper care in making and applying, this combination 

 can be effectively used. As to the application, it should be noted that 

 both Mr. Brown and Mr. Holmes use a gas sprayer, with wliich a good 

 pressure is easily maintained, and use nozzles fine enough to make a 

 satisfactory covering. Both are usually liberal in their applications 

 and unquestionably have shown that they can make a satisfactory 

 mixture without boiling. 



The process is as follows: Use forty pounds of lime, twenty 

 pounds of sulphur flowers and fifty gallons of water. The lime 

 should be of the best qualit}', and flowers, not ground sulphur, 

 should be used. 



Place the lime in a barrel and dust in the sulphur Avith it, so that 

 the two may be well mingled. Add boiling-hot water enough to 

 start a brisk slaking and cover with a heavy blanket to confine the 

 heat. Add hot water as needed, to keep up the slaking, and stir 

 occasionally with a hoe or similar implement. Keep this up until 

 all the lime is completely reduced and mixed with the sulphur. 

 Then let the mixture stand covered for at least half an hour, to 

 maintain its heat; afterward dilute with warm water to the de- 

 sired strength and spray at once. 



