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Etherton Orchard Experiment, 1909 

 Orchard II 



Experiments of 1911 



After the omission of 1910, due to the failure of the insecticide 

 company" to fill our orders on time, both of the Etherton orchards 

 were taken in hand in 1911 for experimental work. Orchard II was 

 divided into four plots, which were sprayed, February 27 to March 

 6, with different brands of lime-sulphur. Orchard I was divided into 

 five plots, four of which were sprayed March 6-9 with different lime- 

 sulphur preparations, and the fifth with Scalecide. All the brands 

 of manufactured insecticides were bought in the open market. 



The manufactured lime-sulphur solutions were all mixed with 

 water at the rate of 1 gallon to 9. The home-made lime-sulphur 

 contained 100 pounds of sulphur and 50 pounds of lime to 60 gallons 

 of water, 9 gallons of this concentrate being diluted with cold water 

 to make 50 gallons. Otherwise stated, the formula for this propor- 

 tion was sulphur, 15, lime, 71/2, water, 50, differing from the home- 

 made solution of the earlier experiments only in the smaller pro- 

 portion of lime. The Scalecide was diluted in a ratio of 1 to 15. 



Owing to the condition of these orchards because of a lack of 

 treatment the preceding year, it was not thought advisable or safe to 

 leave any part without treatment, and no check plots were reserved. 

 The work was in charge of Mr. Flint, assisted by Mr. Smith. 



The original grading was done by Flint and Smith, February 

 22, 1911, and the final grading, December 12 of the same year. In 

 the absence of checks, only ''ratios of improvement" could be com- 

 puted. The home-made lime-sulphur, poured off after the settlement 

 of suspended matter, gave an improvement of 40 percent, and the 

 lime-sulphur of the Grasselli Company, 38.3 percent in Orchard I 

 and 32.7 percent in Orchard II, while the Rex lime-sulphur treat- 

 ment resulted in an average improvement of 39.4 percent. 



