REPORT OF CRANBERRY SUBSTATION FOR 1914. 97 



special sprajdng, and the reduction caused by it, while not definitelj^ 

 computable, was certainly much greater than the figures show. 



Tests of the possibility of controlling fungous diseases by putting 

 copper-sulfate in the flowage were again carried out this year, a solution 

 of the chemical being used in the June reflow on flooding sections 23, 25 

 and 27 at the rate of 1 part to 50,000 parts of water (1 pound in 6,250 

 gallons). The treatment was applied after these sections had been com- 

 pletely flooded for seventeen hours, and the water was then held twenty- 

 six hours longer. The sulfate solution was thrown into the water by the 

 cupful and was distributed as evenly as possible over all parts of each 

 section treated. The date of treatment was June 11. The blossom bud.s 

 were then well developed and they did not seem to be injured by the 

 treatment. 



Both the treated and untreated sections were picked with scoops on 

 September 7, the former showing no definite advantage in the quantity 

 of fruit obtained. In the storage tests, however, the berries from the 

 treated sections showed, in every case, a distinctly smaller percentage 

 of loss than did those from the other sections. These results are exhibited 

 more in detail in the following table: — 



Table 3. — Effect of Treatment with Copper Sulfate in June Reflow. 



1 Treated. 



The reddened and sickly appearance of the foliage on most of the sprayed 

 plots, mentioned in the report for 1913 (page 41), persisted more or less 

 throughout the season of 1914, especially with the Late Howe plots, even 

 where the spraying was discontinued this year. The reason for this 

 apparent injury^ to the sprayed areas was carefully sought, the condition 

 of the root .systems of the sprayed and unsprayed vines being given par- 

 ticular studj^, as such an investigation seemed to promise the most ready 



