54 CRANBERRY DISEASES. 



Preventive measures should include renovation of the cranberry 

 bog, careful control of the water supply, and the cultivation of hardy 

 and disease-resistant varieties. 



Thorough treatment with Bordeaux mixture has proved successful 

 in controlling the diseases. The addition of resin-fishoil soap is 

 essential in order to make the mixture properly cover and adhere to 

 the plants. As a result of five applications in 1905, only 2.3(5 per cent 

 of the sprayed fruit was found to be destroyed at picking time, 

 whereas 92 per cent of the unsprayed fruit on the plat a*d joining was 

 destroyed. 



The cost of five applications, each of 200 gallons per acre, varies, 

 according to the conditions and methods employed, from $15 to $20 

 per acre. 



110 



