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 hme, 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 McFarlin plot) was 

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

 D and E (the Early Black plots) were sprayed with 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. 



Plot. 



Area 

 (Square 

 Rods). 



Date 

 when 

 picked. 



Variety. 



Quantity 



of 



Fruit 



iBush- 



els). 



Quantity 

 per 



Square 

 Rod 



(Bush- 

 els). 



Averase 



of Double 



Checks 



per 



Square 



Rod. 



Per 

 Cent, of 

 Decrease 



on 



Spraved 



Plots. 



A, 



A (check 1), 



A (check 2), 



B, 



B (check), . 



C, 



C (check 1), 



C (check 2), 



D, 



D (check 1), 



D (check 2), 



E, 



E (check 1), 



E (check 2), 



E (check 3), 



16 

 4 

 9 



UVs 



irA 



16 



4 



8 

 16 



3 



9 

 16 



8 



4 



4 



Sept. 24 



Sept. 25 

 Sept. 25 

 Sept. 25 

 Sept. 25 

 Sept. 24 

 Sept. 24 

 Sept. 24 

 Sept. 17 

 Sept. 17 

 Sept. 24 

 Sept. 3 

 Sept. 3 

 Sept. 3 

 Sept. 3 



Howe. 

 Howe. 

 Howe. 

 McFarlin. 

 McFarlin. 

 Howe. 

 Howe. 

 Howe. 



Early Black. 

 Early Black. 

 Early Black. 

 Early Black. 

 Early Black. 

 Early Black. 

 Early Black. 



4Vl5 



13M 



25 



9 



5 



QVe 

 WVs 



6% 

 2iy9 

 21H 

 15 



6H 



S 



.5100 

 1.0170 

 2.8660 



.9380 

 1.8300 



.5625 

 1.2500 

 1.1460 

 1.2300 

 2.13301 

 2. 3460 J 

 1.3440 

 1.8750] 

 1.6250^ 

 2.0000 



1.942 



1.198 



2.240 



1.830 



49 



26+ 



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 with 

 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 very great, as a long hose was used, and tlie outfit was in 



