STATK POMOLOGICAL SOCIETY. 151 



able to sell one at twenty-tive cents. They have been swindled so 

 often, and paid so dear for it, that they have come to love to have it 

 so. They are wedded to the agent; it is love's union, and dead 

 trees, plants and grape vines cannot separate them. 



EXPEKIMENT8 WITH KEEOSENE EMULSION ON THE APPLE- 

 TREE APHIS. 

 By' Charles Little, Rochester, N. Y. 



[From Proceedings of the Western New York Horticultural Society, 188".] 



The summer of 1886 was, in this vicinity, an unusually severe one 

 for nursery stock, particular!}' cherries aud apples ; the black aphis 

 on the cherry and the green one on the apple-trees being unusually 

 numerous and persistent, and of course they gave ns nurserymen a 

 great deal of trouble. 



The cheriy aphis appeared first, but, lortunately for us, were not 

 so numerous on our trees as on those of some of our neighbors. We 

 went over the trees two or three times with the old remedj'of whale- 

 oil soap and tobacco-wator, but found it of comparatively little use, 

 as a solution strong enough to kill the aphis was also strong enough 

 to affect the trees injuriously ; and, as our trees had made a consid- 

 erable growth before the appearance of the aphis, we did not pay 

 much attention to them afterwards. 



The ajjple aphis appeared about the usual time, and, at first, we 

 were not much concerned about them, expecting that they would dis- 

 appear, as usual. But for some mysterious reason of their own they 

 did not take their departure, and bi'sraii to incnase alirmingly fast. 

 On our yearling trees we tried dipping in whale-oil soap and tobacco- 

 water with success, but to dip a large tree was a slow and costly opera- 

 tion. We then began to look about for some chea[)er and quicker 

 method. We found, by experimenting on a small scale with kero- 

 sene soap, that it was sure death to the aphis, but this soap was open 

 to the same objection as the other remed}' ; it was too costly. 



About thifc time there was published by the Department of Agri- 

 culture, at Washington, a receipt for killing the hop- louse, which 

 was making such ravages in the central part of the State. As the 

 principal ingredient was kerosene, we determined to try it on our 

 apple-trees. It was a decided success. After going over our blocks 

 twice there were few or no aphides left, and the expense was trifling 



