TWENTY-EIGHTH FRUIT-GROWERS' CONVENTION. 



149 



expense. I tried it on some pretty good-sized Mediterranean Sweet 

 orange trees, and they are very compact, and he made it cost me 27 

 cents apiece to spray those trees, and I can fumigate them for that price. 

 If it is at the same price, I prefer fumigation to the spray, because they 

 didn't come anywhere near hitting all of the foliage, and trees right by 

 the side of them that were not fumigated or sprayed either have just as 

 little live scale on them as those that were sprayed. Consequently I 

 believe the destruction of the scale on the unsprayed trees was the 

 result of a parasitic or predaceous insect, or both. 



MR. GRIFFITH. I can agree almost entirely with what Professor 

 Cook has said, but I do not think he has gone far enough. I have 

 always been a strong advocate of fumigation. I have become less confi- 

 dent in fumigation, because I am compelled to trust people who are 

 irresponsible to fumigate while I sleep. 



MR. HALL. It is a great pleasure to me to meet upon common 

 ground with Professor Cook. Years past we have often disagreed, but 

 always in a friendly way. And it is also another pleasure to see that 

 the years we discuss these matters pro and con in this Convention 

 gradually the sentiment has become a fixed one that you can kill scale 

 by spraying. But there are two points that I want to make here that 

 have not been made. There has been talk about the proper machine to 

 use and the proper kerosene to use. There must be a distinction made, 

 and many do not know the difference between distillate emulsion we 

 used to buy and the keri-water. Distillate emulsion was made with 

 a soapy mixture, and consequently you did the damage. Keri-water is 

 different, which we mix with water. Properly mixed, it does the work. 



MR. STONE. Does the gentleman mean that the kerosene is to be 

 used in its crude state? 



MR. HALL. The original keri-water was kerosene and water; but 

 instead of kerosene we use the crude oil, which has a certain specific 

 gravity. 



PROFESSOR COOK. There are one or two things which ought to 

 be said in regard to this. I want to plead guilty to my friend Mr. 

 Griffith's charge in regard to my not saying everything. I want now to 

 add one more caution. I would never spray an orchard when it was 

 not in good condition, if I could help it; that is to say, I would want to 

 irrigate before I sprayed, and have it in the best condition. 



A MEMBER. Are all distillates uniform in quality? • 



PROFESSOR COOK. No; and, as Mr. Griffith says, there is the 

 difficulty. But the Southern Refining Company, I am told, gives 

 pretty uniformly a good article. 



MR. HALL. I think our University will soon have out a bulletin. 

 Professor Woodworth has been investigating this matter of distillate 

 oil. It is not crude oil, but the by-products taken out and the crude 

 oil left. 



