598 NEW JEKSEY AGRICULTUEAL COLLEGE 



The Camden Mixture. 



This is a combination bv Mr. E. O. Hnber, of Camden, Xgaf 

 Jersey, and was sent in for trial April 6th, 1906. It appeared to- 

 be a resin and petrolenm combination, which was unstable in char- 

 acter and separated on standing. Mr. Huber was advised of this 

 fact and sent a somewhat larger quantity about the middle of May,, 

 and this combination appeared to be stable. 



The directions were to use it at the rate of 1 to 40 or 50 as a 

 summer mixture, 1 to 25 as a winter mixture, and successful use 

 was claimed in Burlington orcliards. It was to be shaken up a 

 little, tJien put in water gi-adually. at the same time agitating just 

 enough to dissolve. 



The first test was for stability of the diluted mixture, and we 

 found that the coml)ination 1 to 50 would stand for several days 

 without separation, meeting every requirement that could even be 

 reasonably made in a practical use. 



The next test was as to injury to foliage, and it was found that 

 at 1 to 50 and 1 to 25 there was no injury to maple leaves, these 

 being about as susceptible as any within our experience. 



Owing to the small sample, as well as press of other work, no 

 orchard tests were made until August 4th, when Mr. Dickerson 

 sprayed a scaly plum tree with 1 to 20 and a scaly peach tree with 

 1 to 40. 



Two weeks later the plum tree showed some burning effect; 

 some of the leaves were entirely brown and dry, others were some- 

 what scorched but on the whole the injury was not serioiis. As to 

 the scales, many had been undoubtedly destroyed, and that more 

 were not killed was due in part at least to the fact that the foliage 

 prevented the spray from reaching the infested wood. There were 

 quite a niunber of new sets and active larvre. As compared with 

 a neighboring tree of the same kind sprayed with Scalecide at the 

 same dilution, this showed a somewhat gTeater burning and rather 

 more recent infestation. Tlie ]>each tree was uninjured and so 

 were the scales infesting it. 



September 29th, sprayed with the 1 to 20 dilution one small 

 bearing apple rather slightly infested ; one medium-sized bearing 

 plum badly infested, with many recent sets and active larvse; one 



