38 BULLETIN 866, U. S. DEPARTMENT OF AGRICULTURE. 



Table 12. — Effect of various sprays on rot and yield of cranberries (New Jersey). 1 



I'lal No. 



8 (check) 



A 



B 



1918. 



3 (check) 

 4 



7 (check) 



Spray used. 



Pickering (A) 



Pickering (C) 



do 



Pickering (A) 



Bordeaux, 4-3-50... 

 Bordeaux, 2*-lf-50. 

 Bordeaux, 21-21-50. 



Pickering (A) 



Bordeaux, 4-3-50. 



Sal soda and rosin-fish-oil soap, 4-5- 



50. 

 Sal soda and fish-oil emulsion, 4-5- 

 50. 



Barium water and rosin-fish-oil soap. 



Pickering (Cj and rosin-fish-oil soap. 

 Pickering(A) and rosin-fish-oil soap. 



Bordeaux, 4-3-50, and rosin-fish-oil 



soap. 

 Bordeaux, 4-2-50, and rosin-fish-oil 



soap. 

 Bordeaux, 4-1-50, and rosin-fish-oil 



soap. 



Copper 



sul- 

 phate in 

 spray 

 used. 



Per ct. 



0.32 

 .40 

 .54 

 .62 



1.00 

 .64 

 .64 



.6 



1.00 



1.00 

 1.00 



1.00 

 1.00 



1.00 



Total yield. 



All 



berries. 



Pounds. 

 67} 

 57 

 555 

 53* 

 50} 

 73J 

 591 

 78} 

 19ft 

 195 



54} 



41 1 



107} 



38 



741 



591 

 64V 



Rotten berries. 



Pounds 



« 



261 

 12 



53 

 8} 



Per ct. 

 4.8 

 6.5 

 5.4 

 5.8 

 5.6 

 4.4 

 5.1 

 12.0 

 4.2 

 2.8 



11.9 

 7.3 



15.1 

 16.1 



19.1 



20.8 



69.7 

 16.2 



9.7 

 12.8 



Yield per acre 

 (calculated). 



All 



berries. 



Bushels. 



136J 



171} 



207J 

 201} 



268 

 235! 



190 

 185J 



148-J 



1611 



Sound 

 berries. 



Bushels. 

 80 

 661 

 66" 



62? 

 59§ 



ss'i 

 701 

 86} 



1201 



158£ 



176} 

 168| 



216J 



184} 



57J 

 1551 



134} 



1401 



1 All the cranberries tested were of the Centennial variety, except those on plats A and B, which were 

 Early Black. 



The percentage oi rot found on the berries from all of the sprayed 

 plats (Table 12) was so small that it was impossible to differentiate 

 between the sprays with respect to their fungicidal value. The 

 check plat showed but 12 per cent of rot. The Bordeaux, 2|-lJ-50, 

 spray gave the best results for control of rot, but all of the other 

 sprays were almost as good. On the large plats (A and B) 4.2 per 

 cent of rot was found for berries treated with the spray resembling 

 a Pickering spray and 2.8 per cent for those treated with Bordeaux. 

 While the data favor the standard Bordeaux spray, the figures are 

 small . 



Two large plats (A and B) of Early Blacks were sprayed with a 

 power sprayer, one receiving Bordeaux, 4-3-50, the regular spray 

 used on cranberries at Hanover Farms, and the other a. spray resem- 

 bling a Pickering spray of 0.6 per cent copper sulphate content, made 

 by dissolving in water an amount of lime paste calculated from titra- 

 tions to be sufficient to combine with the copper sulphate used. The 

 results thus obtained are not comparable with those obtained from 

 plats 1 to 8 (Table 12). 



Ten small plats of Centennial berries at Hanover Farms, N. J., were 

 sprayed with a barrel-pump sprayer on June 1 1 (three or four days 



