20 



The Bulletin. 



are already quite well known and we can feel fairly safe in our recom- 

 mendations concerning them, even though they were not included in 

 the tests. Owing to the time and funds available for the tests it was 

 considered best to depend upon the materials shown, especially as the 

 ready-made "soluble oils" and "lime-sulphurs" are rapidly coming into 

 general use among fruit-growers. 



As to the spring spraying to reach the young we are forced to believe 

 that it is of secondary importance anyway. Late winter is already the 

 "accepted time" to spray for the control of San Jose Scale on fruit 

 trees, and it is also now evident (tests 1 and 2) that a treatment at that 

 season with the soluble oils gives good results against the Oyster-shell 

 Scale. We would only advise the grower to give the later treatment to 

 kill the young in case he has for some reason been unable to give the 

 winter treatment. In the discussion which follows it will be seen, how- 

 ever, that Mr. W. L. Garren, of Cherokee County, reports good results 

 from spraying in the spring. The testimony which we now give, 

 furnished us by actual growers, can not be regarded as technical tests, 

 because we are uncertain as to such details as the exact strengths used, 

 exact times of treatments, and exact results, but their testimony can be 

 considered as fairly strong evidence. 



Reports of Success by Growers. 



On April 23, 1912, Mr. W. L. Garren, Wolf Creek, Cherokee County. 

 sent infested twigs and asked for remedies. In our reply we recom- 

 mended kerosene emulsion at strength of 15% oil. In a letter dated 

 March 31, 1913, Mr. Garren says: "The tree that was infested one year 

 ago has scarcely a scale on it, I used the kerosene emulsion as you 

 directed and almost exterminated them." 



Looking over some of the elder notes in our office we find the follow- 

 ing, under date of June 19, 1901 : "Mr. Ed. Underdown, manager of the 

 Cone orchards at Blowing Rock (Watauga County), shows me apple 

 trees which have been affected, but spraying with 25% oil emulsion, 

 and washing with strong lye soap, has almost eradicated it." These 

 treatments had been given in winter. 



Another case of reported success is that of Mr. S. J. Luther, Candler, 

 Buncombe County, K C, who sent infested' twigs in March, 1908, but 

 who, when requested to send us infested twigs in 1912, replied: "I am 

 pleased to tell you I can't send the infested apple twigs as per your re- 

 quest. At the time you refer to I mailed several twigs to your depart- 

 ment and received Bulletin treating of this Oyster-shell Scale and how 

 to get rid of it, which I applied as directed, and with two applications 

 killed everything clean and now have clean, healthy trees." We fail to 

 find copy of the letter we wrote Mr. Luther in 1908, but if he applied 

 remedies by our recommendations it was probably kerosene emulsion at 

 25% oil if to be used in winter, and at 157 if applied when there were 

 blossoms or foliage on the trees. 



Still another case is that of Mr. B. C. Price, of Poor's Knob, in the 

 Brushy Mountains (Wilkes County), who made complaint in March, 

 1908. but who wrote in Anril. 1912 ; that he could not furnish infested 



