coo XEW JEKSEY AGEICULTURAL COLLEGE 



■was first sprayed five or six years ago and every year since. The 

 trees are seven years old, in fine condition, very free from scale ; 

 they had borne well and had, when I saw them, so large a crop that 

 it was necessary to thin to prevent them from breaking. 



"A White-Honse orchardist has had a similar exjierience and 

 now nses a 15 i>er cent, mixture of oil and water. But he says that 

 while he uses a smaller percentage he actually gets as much oil on 

 the tree, l>ecause he sprays longer and covers more evenly. He says 

 he has never noticed injury, and I examined the peach orchards 

 that had been so sprayed for several years and found the trees in 

 fine, healthy, clean condition. 



''In one or two instances careless application, which resulted in 

 getting on tr.ty mucli nil, injured peach trees, but in general those 

 using the mixture judge the strength by the appearance of the 

 S]:ray and have learnt to recognize when they get either too little 

 or too much. 



''Several of those using the Kerowater pumps say that they do 

 not always distrilnite accurately, giving a little too much water on 

 the start, but in gen(n-al the pumps seem to have worked quite satis- 

 factorily and to have given good results." 



The interesting feature in this record is that a])plications on 

 peach, our most susceptible fruit tree, continued for five or six 

 vears, have caused no injuiw or accumulation of injury, though 

 from 15 to 25 per cent, of actual oil has been used. It is important 

 as bearing on the question of whether repeated applications of the 

 soluble oils can cause injury, and would indicate a reply in the 

 neo-ative, since these, as applied, contain only about 4 per cent, of 

 actual oil. 



Crnde Oil. 



Crude oil, in one form or another, is still considerably employed 

 throughout the State, the "insecticide oil'' of the Standard Oil 

 Company being the most usual. It is used by few peach-growers, 

 more by growers of apple and pear, and in some cases growers 

 that have failed to destrov the scale on tlieir large, bearing trees 

 with ibc lime, salt and snl]iliuv wash, are using crude oil with suc- 

 cess. !\Iost of the iiicii rliar use it now understand its ])enetrating 

 character, and know That while this makes it a scale-killer of the 

 first order, it als(^ makes it d:\ngerous to their trees when care- 



