496 



STATE BOARD OF AGRICULTURE. 



FOR LARGE ACREAGES. 



To make 100-srallon batches. 



Bordeaux 

 4-4-50 or 

 8-8-100 

 formula. 



(1) Secure four 50-gallon barrels. 



(2) Fill barrel No. 1 half-full, and hang 25 pounds of 

 Bluestone so that the Bluestone is just under the surface of 

 the water. This makes stock Bluestone, 1 pound to the gallon. 



(3) Fill barrel No. 4 half- full of water and stir 25 pounds 

 of freshly slaked stone lime or about 30 pounds hydrated 

 lime in it. This is the stock lime paste, about 1 pound to the 

 gallon. 



The stock solutions will make 300 gallons of spray. They 

 will keep if covered. 



(4) Take S gallons stock Bluestone from barrel No. 1 and 

 add to 42 gallons of Avater in barrel No. 3. (That is, fill tlie 

 barrel). 



ADDS GALS. OF STOCK PLUE5TONE 



FROM BW. Nc.lT042 



C'AL5.0F W/=>TE:R 



ADDSOALS.Or <9T0CH LIME 

 FROM6hLNo4T0 42. 



oal;o. of water. 



Fig. 7. IIow to make Bordeaux mixture in 100 gallon amounts. 



(5) Take 8 gallons of stock lime from barrel No. 4 and 

 add to 42 gallons of water in barrel No. 3. 



(G) Run these materials together through a strainer into 

 the sprayer tank. The combination is Bordeaux mixture 

 and must be applied at once. 



If the spray tank holds only 50 gallons make the dilution on one-half the above scale. 



The first batch may be tested with litmus paper to make sure that there is lime enough. 

 If blue litmus paper turns red, add more lime. With good fresh lime using the amounts 

 given, no test is needed. If weather conditions prevent the using of a batch of Bordeaux, 

 it may be kept for a long time if cane sugar is added at the rate of one-half pound to 

 50 gallons. 



