002 NEW JERSEY AGRICULTUEAL COLLEGL 



Ions of K.-L. were used and in evei-y instance the application was 

 liberal, since there was no inducement to economy, and the dealer 

 rightly claimed that unless he was allowed to do Ihe work well 

 he could not guarantee a good result. The formula was five gallons 

 of kerosene, twenty jjounds of liraoid and twenty-five gallons of 

 water, making an actual proporti(m of one-sixth, or about 16 per 

 cent, kerosene. The oil and limoid were thoroughly mixed together 

 with a hoe, and then, by a like process, the water was mixed as 

 added, and what appeared to be a good combination was obtained. 

 Whenever the infestation was bad a second application was made. 

 So far as the examinations extended the results wore good, even 

 where only a single application was made. In onlv a few cases 

 they were unsatisfactory on old, bearing apples, but in one instance 

 this may have been due to rain coming immediately after the 

 spraying was done. The effect on the trees was not so uniformly 

 good. Apple and pear were safely sprayed in all instances; plums 

 were sometimes injured and young peaches were in some instances 

 killed. 



The results prove that the Iv.-L. will kill scales where used 

 liberally, and will also kill some trees where enough oil gets on 

 them. It is fair to say, however, that the method of mixing was 

 unsatisfactory and not calculated to secure the best results as 

 against the scale or the greatest measure of safety to the trees. 



To make an even mixture and get a real emulsion, stirring with 

 a hoe is not enough. There should be a thorough churning by 

 pumping the material back into the tank until it has all passed 

 through the pump at least once and has been forced through the 

 nozzle back into the mixture again with pressure enough to stir it 

 up violently. The injury caused was probably due id free oil con- 

 tained in the spray as applied. 



In Passaic county an orchard of abo\it one hundred and thirty 

 large apple trees was treated for two years in succession with the 

 combination containing about 20 per cent, of kerosene. At the 

 date of inspection, ]\tarch 22d, 1906, the trees seemed to be in 

 very fair condition, and very little living scale was observed. 

 Later examinations were not made, owing to press of otlier work. 



