40 



MASS. EXPERIMENT STATION BULLETIN 369 



than the 5-2-50 and was superior to either the red or yellow copper oxides. Both 

 the red and yellow copper oxides were much slower in action than bordeaux mix- 

 ture and did not kill out the rosebloom as completely as did bordeaux. A week 

 after rosebloom had been killed out by bordeaux mixture, living unaffected or 

 only partly killed diseased shoots could be found on plots sprayed with either 

 red or yellow copper oxide. 



Spraying Experiments for Cranberry Rot Control. (H. F. Bergman and W. E. 

 Truran.) Spray tests were run on four bogs, on plots of 1/20 acre area. All sprayed 

 plots received two applications, at the rate of 250 gallons per acre; the first when 



Number Average Percentage Rot 



of 



Plots Oct. 1 Nov. 1. Dec. 1 



Bordeaux 5-2-50 (high Ca) State S 8 2 1.0 



Bordeaux 5-2-50 (high Ca) State S 14 4 1.3 



Bordeaux 5-2-50 (high Ca) .No. 3 4 8.9 



Bordeaux 5-2-50 (high Ca) No. 7 4 



Bordeaux 5-5-50 (high Ca) No. 9 3 3.6 



Bordeaux 5-2-50 (high Mg) No. 9 3 5.4 



Bordeaux 5-2-50 (Wgh Mg) State S 8 2 0.8 



Check* States 8 3 1.4 



Bordeaux 5-3-50 (high Ca)-f J^ lb. zinc arsenite. . .State S 8 2 1.0 



Check* States 8 2 2.7 



Bordeaux 5-3-50 (high Ca)-|- H lb. zinc arsenite. . .No. 3 2 9.0 



Bordeaux 5-3-50 (high Mg) + K lb. zinc arsenite . . No. 3 2 11.6 



Bordeaux 5-3-50 (high Ca)-i- ?^ lb. zinc arsenite. . .State S 8 2 0.9 



Check* States 8 2 1.6 



Bordeaux 5-3-50 (high Ca) + J4 lb. zinc arsenite. . .No. 7 2 



Check* No. 7 2 



Bordeaux 5-3-50 (high Mg) + % lb. zinc arsenite . . No. 7 2 



Check* No. 7 2 



Bordeaux 5-3-50 (high Ca)-fl lb. zinc arsenite. .. State S 8 2 0.9 



Check* States 8 2 1.7 



Cuprocide — bentonite No. 7 3 



Cuprocide54Y (lH-50) State S 14 2 1.1 



Check* States 14 2 1.4 



Cuprocide 54Y (2-50) State S 14 2 1.2 



Check* States 14 2 3.1 



Cuprocide 54Y (1 1^-50) No. 3 2 9.1 



Cuprocide 54Y (2-50) No. 3 2 9.2 



Cuprocide 54Y (11^-50) No. 9 3 6.2 



Phenothiazine 2-50** State S 14 2 1.4 



Check* States 14 2 1.5 



Phenothiazine 2-50 State S 14 2 2.2 



Check* StateSU 2 3.5 



Check State S 8 4 2.5 



Check States 14 5 2.2 



Check No. 3 5 17.6 



Check No. 7 5 



Check No. 9 5 39.7 



♦Figures here given apply only to plots indicated on line above; in all other ca 

 plots as given at bottom of table apply. 

 **No wetting agent. 



2.8 

 4.9 



16.5 

 4.7 

 9.3 



10.0 



4.9 

 7.6 



3.8 

 12.0 



16.3 

 21.1 



2.8 

 8.0 



3.8 

 27.8 



5.2 

 21.1 



3.5 

 6 6 



3.7 

 8.0 



4.0 

 10 



18.8 

 15.7 



6.4 

 7.3 



7.2 

 11.7 



34.7 

 25.8 

 52.8 



10.1 

 12.7 

 26.8 

 10.1 

 13.3 

 14.2 



11.5 

 18.3 



13.8 

 24.3 



28.7 

 31.2 



11.7 

 16.9 



9.2 

 35.8 



12.1 



37.2 



13.1 

 14.8 



10.9 

 16.2 



10.3 

 19.8 



30.2 

 27.4 



15.4 

 15.2 



16.7 

 21.4 



19.1 

 17.1 

 44.5 

 38.5 

 56.5 



1 values for check 



