April, '11] METCALF: EUONYMUS SCALE 259 



combating the striped cucumber beetle, etc.; others giving the 

 addresses of manufacturers of spraying machinery and of insecticides 

 and such other information as is most frequently asked for. This 

 saves much time in dictating letters and an extension of the plan 

 would enable a bright clerk to take care of much of the correspondence 

 without much help. 



The time has long since gone by when the station entomologist can 

 quietly remain at his office headquarters and prosecute his researches 

 without interruption by his constitutents. Today they wash to 

 know what he has done and what he is doing and it is apt to be his 

 own fault if they do not value his advice as highly as they do that 

 of other agricultural experts in different fields of endeavor. Upon 

 his good sense and cleverness in presenting results that are worth 

 presenting, will depend the continuance of the public favor toward 

 entomological activities, now so happily achieved and held. 



SPRAYING FOR THE EUONYMUS SCALE 



By Z. P. Metcalf, Assistant Entomologist, State Department of Agriculture, 



Raleigh, N. C. 



The euonymus is one of the most desirable hedge plants grown in 

 North Carolina. It is evergreen, hardy, and with the exception of 

 the euonymus scale seems to be free from diseases. This insect, 

 however, is so destructive that what were once beautiful hedges are 

 now reduced to scraggly clumps or the entire hedge has been cut down 

 and removed. 



During the summer of 1909, what had once been a magnificent hedge 

 was turned over to us for experimental purposes. This hedge con- 

 sisted of about one thousand feet averaging four and one-half feet 

 high, and about two feet wide. This together with ten large clumps 

 averaging thirty feet in diameter and twenty to twenty-five feet in 

 height gave us an excellent chance to try out practical remedies. 

 The hedge was in varying degrees of infestation. In fact, about three 

 hundred feet of the hedge was so far gone that it was thought best to 

 cut it down and reset with young hedge. About 90 per cent of the 

 plants in the portion removed were dead, the remainder were very 

 nearly dead. On July 16, 1909, kerosene emulsion, prepared in the 

 usual manner, at the strengths of 15, 20 and 30 per cent oil was used 

 on three different clumps of euonymus separate from the main hedge. 

 All three clumps were badly infested. These clumps were inspected 

 on July 23. At this time it was found that the 15 per cent kerosene 

 emulsion had done very little good, — certainly not more than 10 per 



