4 MASS. EXPERIMENT STATION BULLETIN 168. 



It will be seen that the results with these plots were entirely in line with 

 the experience of former years, the quantity of fruit obtained from the 

 sprayed areas being in every case distinctly less than that produced by 

 the untreated checks. Moreover, the plots which had been treated for 

 several years, and on which the spraying was suspended in 1915, also 

 yielded distinctly less fruit than their checks, thus showing a marked 

 persistence of the results of the injury caused by the treatment. The 

 results of the storage tests show the same benefit from the spraying, as 

 regards its effect on the keeping quality of the berries, as that obtained 

 in previous seasons. It should be observed, however, that in every case 

 tested, the berries from the areas on which the treatment of previous 

 years was suspended showed poorer keeping quality than did those from 

 their checks which had never been treated. This seems to show that the 

 good results obtained by spraying do not persist from one year to another. 



The possibility of controlling fungous diseases by putting copper sul- 

 fate in the flowage was tested again this season, a solution of the chemical 

 being used in the June refiow on flooding sections 23 and 27 (of station bog) 

 at the rate of 1 part to 50,000 parts of water (1 pound in 6,250 gallons). 

 The treatment was applied June 17, after these sections had been com- 

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

 hours longer. An even distribution of the chemical was obtained by con- 

 stantly dragging it around in a sack in the water as it dissolved. The blos- 

 som buds were well developed, but they did not show any injury from the 

 treatment. Both the treated and untreated flooding sections were picked 

 with scoops on September 17, the former showing no advantage in the 

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

 treated sections showed smaller percentages of rot than did those from 

 the other sections, though the advantage apparently obtained was not great 

 enough to be especially gratifying. These results are similar to those ob- 

 tained in 1914. They are shown more in detail in the following table: — 



1 Treated. 



