REPORT OF CRANBERRY SUBSTATION FOR 1916. 189 



The table shows that as a rule the areas sprayed in 1915 were less pro- 

 ductive in 1916 than their untreated checks, and that the fruit from these 

 sprayed areas was inferior in keeping quality in all cases in 1916. In this 

 connection the figures given for plots B and D in Table 2, taken from the 

 last report of the substation (Bulletin No. 168, page 3), are of interest. 



Judging by the results of the 1915 and 1916 storage tests given in 

 Tables 1 and 2, the resistance of the plants to the attack of fungous dis- 

 eases had been weakened by the injury caused by Bordeaux mixture 

 described in previous reports. 



Three plots, numbered, respectively, B. L. 1, B. L. 2 and B. L. 3, were 

 sprayed with "Black-Leaf 40" used at the rate of 1 part to 400 parts of 

 water, 2 pounds of resin fish-oil soap to 50 gallons being added to spread 

 and stick the spray, on the dates and with the results shown in Table 3. 

 These plots and their checks were all picked with scoops. The storage- 

 test fruit was stored, without separating, in quart cans with covers on 

 tight but not sealed, the berries being taken by hand from different parts 

 of the picking crates, all the crates being thus represented. 



The spray evidently did not much affect the quantity of fruit, and the 

 storage tests showed no fungicidal value for it. This was not entirely ai 

 fair test, as all the sprayed areas had been treated with complete commer- 

 cial fertilizer mixtures in 1915, but the impairment in keeping quality 

 shown by the sprayed berries as compared with the check fruit was in all 

 cases greater than that heretofore found by the writer to have resulted' 

 from the use of fertilizers. Did this spray have a harmful effect in this 

 regard in some way? 



Two plots, numbered A. L. 1 and A. L. 2, were sprayed with "Corona" 

 arsenate of lead, used at the rate of 3 pounds to 50 gallons of water, on the 

 dates and with the results shown in Table 4. These plots and their checks 

 were picked with scoops, and the storage-test fruit was selected and stored! 

 in the same way as that of the "Black-Leaf 40" plots. 



