EXPERIMENT STATION REPOET. 625 



This combination should b<?, theoretically, a very effective one, and 

 and I am not at all sure that good results will not be obtained by 

 using a 35 per cent, mixture in late October or early November. 



Kerosene Napthol. 



This is a preparation sent in for trial, with directions to dilute 

 with twenty parts of water. The formula sent with the material 

 showed 60 per cent, of petroleum distillate, combined so as to be 

 readily soluble in water — a combination which promised well and 

 which left nothing to be desired as to ease of application. One barrel 

 lot was used on the grounds of Mr. James Neilson, beginning Feb- 

 ruary 35th — in part on a few trees in his garden, but mostly on a 

 long, Osage orange hedge. The outfit consisted of a horizontal lever 

 pump, of much greater power than needed, bolted to a wagon, and 

 pumping from a fifty-gallon barrel to two spray rods with Vermorel 

 nozzles. The emulsion was diluted with two or three times its bulk 

 of warm water, and, when thoroughly combined, cold water was added 

 to make up the quantity. It will be noted that at the dilution given 

 the spray contained a little over 2 per cent, of actual oil, but it was 

 believed that the character of the combination was such that that 

 might be sufficient. 



Examinations were made June 37th, and only a very partial effect 

 was noted. There had been some destruction of scale, without doubt, 

 but nothing like the percentage necessary to carry the trees through 

 the summer. The new shoots of the hedge were already well set with 

 larvae, and promised a worse condition by the end of the summer than 

 existed when the application was made. One plum tree especially, 

 which had been quite badly infested, was swarming with young. 



A smaller lot was tried on a few trees of the Experiment Orchard, 

 March 6th, diluted with only ten times its bulk of water. Six trees 

 were treated, but unfortunately five of these had been sprayed with 

 "Kill-0-Scale" in October, 1904, and only one tree. No. 39, could be 

 used as a fair test. This was by no means a badly-infested tree, yet 

 on June 35th scales were noted on the fruit, and a few days later 

 they had become abundant enough to make it advisable to use fish-oil 

 soapsuds in an effort to prevent further infestation. 



The outlook w^as not encouraging, but it was hoped that it might 

 have a field as a summer application. The small balance of material 



40 



