158 THE CONNECTICUT POMOLOGICAL SOCIETY. 



applications during- the season will hold them in check. A 

 stronger mixture, 12^ or 15 per cent., would doubtless have 

 cleaned them all off since they were not protected by rough 

 bark. The use of 10 per cent. K-L once every ten days for 

 two months will certainly eradicate them, but this increases 

 the expense too much. A stronger mixture with fewer ap- 

 plications is preferable. There was no foliage injury to these 

 trees. 



November and December Treatments. 

 . A report can be made on only a portion of this work since 

 time enough has not elapsed since spraying to determine the 

 total efifectiveness of the mixtures. An effort was made to 

 discover what percentage of kerosene with different forms of 

 lime, with and without adhesives, will be the most economical 

 combined with efficiency, and what will be the difference of 

 results from different strengths of mixtures. 



It requires from six to ten weeks for the late November 

 and December applications to show how effective they have 

 been. The results given are, unless otherwise mentioned, 

 from actual counts made of the scales from dift'erent parts of 

 the tree on both rough and smooth bark. While this method 

 of countins: is not an absolute index of the condition of all the 

 insects on the tree, it is, moreover, the most reliable means of 

 ascertaining the killing effect of the spray. In making the 

 determinations,' only those insects were considered dead wdiich 

 have recently dried up or are badly discolored and in a dry 

 doughy condition. Those that were of normal color or much 

 or little discolored, doughy and juicy, w-ere counted as alive 

 or doubtful. The second class is becoming fewer, while the 

 first class is becoming more numerous. It will no doubt be 

 several weeks yet before all of those which are really killed 

 by the spray will be dried up, so there is no possibility of 

 error in determining their condition. At present they are 

 classed as doubtful, which lowers the real percentage effi- 

 ciency of the mixture. Limoid was used in making these 

 mixtures, except where special mention is made to the con- 

 trary 



