from 25 to 35%). It may be used at twice this strength and 

 perhaps will be surer, but the abo ve formula should be 

 efficient. Stir the formalin and water and apply to thc soil. 

 Allow the bed to dry several days before sw'ing the sed. It is 

 thought that this will prove more expencive and less effeetive 

 than the hot water method. 



BORDEAUX MIXTURE 



Bordeaux mixture, as reeommended in Circular No. 28, 

 was used on the tobáceo seed beds at the Estación Central 

 Agronómica during the past year with complete success. 

 No injury to the plants resulted from its use and the results 

 were as good as could be hoped for. 



The young beds were closely watched and, whenever the 

 disease was seen, the whole bed was treated as soon as 

 possible with Bordeaux. The surface oí the ground and the 

 plants were thoroughly wet, using common watering cans 

 with fine sprinklers. Sonie of the beds were treated as mueh 

 as three times. Several rains washed the Bordeaux off and 

 the fungus started growing again. 



DIRECTIONS FOR MAKING AND USING 

 BORDEAUX MIXTURE 



Bordeaux mixture is a well known preparation for 

 checking furgus diseasses on plants. It is made by uniting 

 sulfate ofcopper with lime in a special way, and it can not 

 be purchased ready made in a satisfactory form. It must be 

 prepared where it is to be used, and applied within a few 

 hours. The principal inconvenience in making Bcrdeaux 

 mixture in Cuba is thedifficulty of securing good quick lime. 

 Air slaked lime will not make good Bordeaux; thc hottest, 

 freshestquick lime available should be used. By thefollowing 

 method we have succeed in making a servicable Bordeaux. 



Take a quantity (not less than a sack or barrel) of the 

 best quick lime wich can be secured. Slake this carefully with 

 water, not using more than enough to keep the lime moist 

 until thoroughly slaked; then add water to make a paste. 



