904 



HORTICULTURE 



December 18, 1909 



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THE SOLUBLE OILS FOR SAN JOSE 

 SCALE. 



Editor of HORTICULTURE: 



I have read with interest the article 

 in your issue of Dec. 11th, under the 

 heading, "Controlling the San Jose 

 Scale." I wish to take exception to 

 a few of the statements made in this 

 article. It states: "It is true that 

 where no spraying is being done for 

 it (referring to the Scale) or where 

 the wrong material, such as the solu- 

 ble oils or too greatly diluted com- 

 mercial preparations of any kind are 

 being used — it is not being controlled." 

 I will also quote from this article as 

 follows: "It is necessary in spraying 

 that the proper solution be used." 

 Then referring to some party who 

 sprayed 22,000 trees with an oil solu- 

 tion and piactically every tree had 

 been killed. 



The writer happens to be in touch 

 with fruit growers in all parts of the 

 country, especially as pertaining to 

 the territory in which is found San 

 Jose Scale and other scale insects. In 

 a recent conversation with one of the 

 very large Pennsylvania fruit growers, 

 located near the Pennsylvania Experi- 

 ment Station, the fruit grower in ques- 

 tion made the statement that for fall 

 spraying he was so decidedly in favor 

 of a properly made soluble oil that he 

 would not use the lime-sulphur wash 

 if it cost him nothing. He had used 

 very extensively both the lime-sulphur 

 wash and soluble oils, and he made 

 the further statement that the soluble 

 oils, if properly made, did more in con- 

 trolling the scale in one season's 

 spraying than he had ever been able 

 to do in four or five seasons' spraying 

 with the lime-sulphur wash. 



In the past few w'eeks a number of 

 the large fruit growers' associations 

 have sent out circular letters to the 

 effect that after five or six years of 

 persistent spraying with the lime-sul- 

 phur wash, they had found it impossi- 

 ble to effectually destroy the scale in 

 badly infested sections by the use of 

 the above mentioned material. 



In one of the states where fruit is 

 grown the most extensively, the grow- 

 ers, after two or three years of thor- 

 ough and careful experimenting, are 

 using the soluble oils, and have even 

 gone so far as to put up a plant for 

 the purpose of attempting to make 

 their own soluble oil, the results being 

 so much better than they obtained 

 with the lime-sulphur wash. 



It is safe to assume that the sales of 

 soluble oils — properly made soluble 

 oils — are this year at least five times 

 greater than any year before. 



It is a significant fact that many 

 large nurserymen who have thorough- 



ly tested out the matter and who use 

 anywhere from 20 to 100 barrels a 

 season, have decided definitely on the 

 use of soluble oil, and give the other 

 material mentioned no consideration 

 whatever. 



All unprejudiced growers realize that 

 properly made soluble oils have come 

 to stay, and thorough tests have 

 proven that they are much more ef- 

 fectual in destroying the scale than 

 the lime-sulphur wash. 



It is not the intention to endeavor 

 to represent that the lime-sulphur 

 wash is not worthy of consideration, 

 for it is, but more largely as a spray 

 for use in the spring, and quite largely 

 for its fungicidal value. 



As to the question of injury by the 

 use of oil, there have been some worth- 

 less products put on the market that 

 have never deserved the name of solu- 

 ble oil, as they were more nearly a 

 combination of ammonia, rosin and 

 alkali, and such oils are injurious, 

 especially on peach trees when sprayed 

 in the spring; but this has no bearing 

 on the value of a properly made solu- 

 ble oil as a scale-destroying spray. 



It is my opinion that such an article 

 as that you published in your paper is 

 decidedly misleading, as more growers 

 are every year trying the soluble oils, 

 and more growers are adopting their 

 use as scale-destroying remedies, and 

 the writer is of the opinion that more 

 illustrations of saved orchards through 

 the use of soluble oils can be offered 

 than could be shown from the use of 

 the other wash. F. G. STREET. 



Rochester, N. Y. 



AN APHINE TEST. 



The Geo. E. Talmadge Co., Inc., gave 

 an interesting demonstration on De- 

 cember 13 at 50 West 28th street. New 

 York, of the efficiency of Aphine as an 

 insecticide. This preparation, which 

 has now been on the market for some 

 time and giving excellent results, as 

 testified to by many growers of high 

 lepute. has been working irregularly of 

 late and complaints of injury to plants 

 have been coming in to the office of 

 Mr. M. C. Ebel from some who have 

 been using it. Investigation disclosed 

 the fact of unaccountable carelessness 

 in Lhe mixing of the ingredients at the 

 factory in Madison, N. J., and the re- 

 sult has lieen the discharge of Mr. Tal- 

 madge, who has hitherto had entire 

 control of the manufacture. Mr. Ebel, 

 who is the responsible financial head 

 of the concern, has undertaken to undo 

 the mischief, replace the spurious ar- 

 ticle with the proper compound and 

 maiulain the recognized virtues of the 

 insecticide by careful compounding. 

 The demonstration at New York was 



in pursuance of this object and It Is 

 understood that a similar test will be 

 made at Boston, where large quanti- 

 ties of the liquid have been sold — di- 

 rectly after the holidays. 



In compliance with Mr. Abel's pub- 

 lished request portions of plants in- 

 fested with green fly, scale, mealy bug, 

 etc., were supplied by various grow- 

 ers and there was no question but 

 what the solution destroyed all the in- 

 sects with which it came in contact, 

 and without any apparent injury to 

 the foliage. White chrysanthemums 

 and other flowers thoroughly soaked 

 with the liquid showed no indications 

 of discoloration, and altogether the 

 test was quite convincing to those who 

 were present. 



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