EXPERIMENT STATION REPORT. 611 



Where water pressure is not available a solid jet from a pump 

 will answer, and the jet need not have over one-sixteenth inch in 

 diameter at the nozzle: it is the force behind the water, rather than 

 the size of the stream, that counts. This application should be made 

 as soon as possible after the cottony masses make their appearance, 

 and before the eggs begin to hatch. The actual time is indicated in 

 the preceding account of observations made. 



RECORD OF INSECTICIDE IITORK. 



Only a part of the experimental work done is here recorded, and 

 that is especially the case with the oil preparations. The object is to 

 give the results obtained, without too much detail, and with yet enough 

 facts stated to show that there is a. basis for the conclusions reached. 

 Over a dozen preparations other than those here mentioned were 

 received, and some were not used simply because no satisfactory op- 

 portunity developed. These will be tested next season if possible. 



In the case of the oil and sulphur combinations, field observations 

 are included, though the applications may not have been made under 

 control. It is as important to know what results the average farmer 

 obtains as to learn what can be done when all factors are favorable. 

 The ideal insecticide is that with which failure is impossible, even in 

 ignorant hands, provided only that the application is complete. 



Lime and Snlphur. 



The question of just how the armored scales are killed by the com- 

 bination of lime and sulphur is not satisfactorily settled, and it was 

 suggested by Mr. P. H. Pough, of the T. & S. C. White Sulphur Com- 

 pany, that the lime might be merely a carrier to divide the sulphur 

 and favor decomposition, a result that might be reached by simply 

 mixing very fine sulphur dust with ordinary milk of lime. To test 

 this view, a bag of very fine sulphur dust was sent in and was used 

 April 6th on the College Farm. 



Thirty- three (33) pounds of lime were slaked with cold water and 

 diluted until the thick milk of lime was entirely cold, then seventeen 

 pounds of the sulphur dust were stirred in thoroughly, so as to form 

 an even mixture, which was diluted to make about fifty gallons, and 

 sprayed on Standard pears and one side of three rows of apple trees. 



