EXPERIMENT STATION EEPORT. 619 



Except the last, the above applications were made by or under the 

 direction of Mr. E. L. Dickerson, my assistant as State Entomologist, 

 or Harold 0. Marsh, who had acted as field and office assistant during 

 the summer of 1904. Mr. Dickerson, in his notes on the applications, 

 remarked that "where plenty of pressure was put on the pump and 

 the spray was driven into the tree, it adhered much better and covered 

 much more completely:" and this was before attention had been 

 specifically directed to this point. 



A barrel of "Kill-0-Scale" was sent into Burlington county and 

 was used experimentally on a variety of trees in two or three different 

 orchards. These applications were not under control, were in part 

 put on as side issues, and were not as effective as they should have 

 been. Good and even excellent results were obtained, but they were 

 not nearly so complete and convincing as those obtained in the 

 orchards dealt with under direct supervision. 



A very interesting observation was made in an old apple orchard 

 near Bound Brook, which was sprayed by a local nurseryman with 

 material ("'Kill-0-Scale") furnished by tlie owner. I was advised of 

 the time when the spraying would be made and sent Mr. Dickerson to 

 watch it. It proved to be an excellent illustration of how spraying is 

 often done, and I advised the owner at once that he must not look 

 for. satisfactory results. The object seemed to be to get over the 

 gi-eatest number of trees in the least possible time, and whenever the 

 spraying rod had been over as many movements as might be reason- 

 ably required for a covering, the work was considered finished. Such 

 work is bound to be unsuccessful, no matter what the material applied, 

 and it is regretfully concluded that much of the work usually done is 

 of this same general character. 



Nothing will be gained by recording duplications of the results 

 already given : some are favorable and others unfavorable ; but the 

 central fact remains that, diluted with twenty parts of water, this 

 "Kill-0-Scale" will Idll the pernicious scale at all periods of the 

 year — though most certainly in fall : provided always, of course, that 

 the mixture actually reaches the insects aimed at. 



For summer work "Kill-0- Scale" is absolutely useless. I tried it 

 at all sorts of strengths on foliage of all kinds and always with bad 

 results. The experiments were not confined to fruit trees, but were 

 extended to the ordinary shade trees, upon which the effect was 

 identical. The actual percentage of oil in a dilution with thirty parts 



