New York Agricultural Experiment Station. 309 



OBJECT AND PLAN OF THE EXPERIMENT. 



Object. 

 The object of the experiment was to compare sprayings begun 

 very early with those begun medium early and late. Bordeaux 

 mixture and different strengths of formalin and lysol were also 

 to be compared with different strengths of potassium sulphide. 



Plan op Experiment. 



The Industry plantation of King & Robinson, Trumansburg, 

 N. Y., was used for the experiments. It consisted of 32 rows with 

 11 plants to the row. As shown by the diagram opposite, the 

 plantation was divided into six plats. Each treatment was ap- 

 plied to two plats separated by plats receiving different applica- 

 tions. This arrangement was for the purpose of equalizing for 

 each remedy the differences in soil and location which might 

 exist in different parts of the plantation. 



For convenience in comparing the effects of very early with 

 medium and late spraying, three series of treatments were made. 

 Series I was begun very early, April 12, just as the buds were 

 breaking and successive applications were made at intervals of 

 about ten days until seven had been given. Series II was begun 

 April 23 when the second treatment of Series I was made. The 

 first treatment of Series III was applied May 5 when the third 

 treatment of Series I and the second treatment of Series II were 

 given. During the remainder of the season the dates of treat- 

 ment were the same for all applications. An untreated row was 

 left as a check for each series. 



Materials Used. 



Bordeaux mixture, 1-to-ll formula, was used upon one set of 

 bushes in each series until the fruit was large enough so that 

 spotting with the mixture would injure its sale; then potasisium 

 sulphide, 1 oz. to 2 gals, of water, was substituted for the re- 

 mainder of the season. 



Potassium sulphide was used in two strengths, 1 oz. to 2 gals, 

 of water and 1 oz. to 3 gals, of water. 



