40 



MASS. EXPERIMENT STATION BULLETIN 150. 



been received. The five plots, each four rods square, which were sprayed 

 in 1911 and 1912 as indicated in previous reports, were all sprayed again 

 this season with Bordeaux mixture used in the same way as last year 

 (3 pounds of lime, 4 pounds of copper sulphate and 2 pounds of resin 

 fish oil soap to 50 gallons of water), but a greater number of times, plots 

 A and C (Lake Howe plots) being sprayed with the Bordeaux on June 5, 

 June 17, June 28 and July 19, and with neutral copper acetate (1 pound 

 to 50 gallons of water) on August 7. Plot B (the McFarhn plot) was 

 sprayed with Bordeaux mixture on June 6, June 18 and July 21. Plots 

 D and E (the Early Black plots) were sprayed "svith Bordeaux mixture 

 on June 6, June 18, July 11 and July 22. The crop was gathered from 

 these plots and their checks on dates and in amounts as follows, the 

 quantities being given in bushels : — 



Table 1. 



It will be seen from this table that there was a general very marked 

 falling off in the fruit produced by these sprayed plots as compared wnth 

 the surrounding untreated portions of the bog. Where two checks were 

 laid out for the same plot (as noted in the table), they were in every case 

 located on different sides of the sprayed area. The berries were all picked 

 with scoops. The spraying was done with a 30-gallon wheeled-barrel 

 outfit, as heretofore, but the mechanical injury done in the process of 

 spraying was not veiy great, as a long hose was used, and the outfit was in 



