FOURTEENTH ANNUAL MEETING. 147 



but while all the results which I shall give to you are sub- 

 stantially the same, there have been some changes. I think 

 it pays best to give a complete account of work of this char- 

 acter, and I trust that my paper will not seem long to you, 

 and will not seem as long to you as it did to me in preparing 

 it. 



You will notice that I have some of those bottles here 

 showing samples of these different mixtures, and I will 

 pass them around. You know there is nothing like a 

 bottle to keep a man awake. The title of my paper is" New 

 Kerosene-Limoid mixtures for controlling the San Jose 

 scale." 



The New Kerosene-Limoid Mixtures for Controlling 

 the San Jose Scale. 



By C. p. Close, Horticulturist of the Delaware Agricultural Experiment 

 Station, Newark, Deleware. 



For a number of years it has seemed to the speaker, as he 

 has studied the San Jose scale and watched its depredations, 

 that the opportune time to strike it is during its breeding sea- 

 son, that is, during the summer. The insects are easily killed 

 then, because the young are either not at all, or only slightly 

 protected, while the scaly covering of the old ones does not 

 clasp the bark so tightly but that the spray mixture will readily 

 reach the tender insects beneath. 



If only the young scales on a certain tree can be killed 

 from time to time and be prevented from breeding, the pest 

 will be eradicated from that tree, since the old females die of 

 their own accord after producing young for about six weeks. 

 But diligent spraying will kill not only the young but also 

 hosts of old ones, thus hastening the eradication of the pest. 



It was with the idea of determining the practicability of 

 the summer eradication of the scale that tests were made dur- 

 ing the growing season. That this can be done satisfactorily 

 there is abundant i^'oof from tlie results obtained. It was 

 also desired to obtain a remedy for both summer and winter 

 applications that would be easily prepared, less disagreeable 



