384 Bulletin 164. 



o 



the application has dried. However, under certain conditions, 

 the foliage of the peach seems to be easily injured by spraying 

 with Bordeaux mixture. With weak Bordeaux mixture properly 

 made, I have not been able to produce any injury on the trees 

 experimented upon. 



The customary formula for Bordeaux mixture is : 



Copper sulfate (blue vitriol) 6 lbs. 



Unslaked lime (good quality) 4 lbs. 



Water 50 gallons. 



In spraying the foliage of peach trees, reduce the copper sul- 

 fate to four pounds. Even this may seem strong. It should 

 not, however, be condemned until tried; and when tried the 

 mixture should be made by the one method which has been 

 most successful.* To dissolve the copper sulfate, suspend it in 

 a coarse sack in a barrel containing twenty-five gallons of water. 

 Slack the lime (use only the best) slowly, and then dilute it to 

 twenty-five gallons. Pour the two together in this dilute form, 

 stirring for a few minutes. Stir before using. If large 

 quantities of the mixture are desired, stock solutions ma}^ be 

 made as usual. Dissolve say fifty pounds of the copper sulfate 

 in a barrel containing as many gallons of water. The stock 

 solution of lime may be made of the same strength. Then each 

 gallon means a pound of the substance wanted. When the mix- 

 ture is made, dilute each solution separately before pouring 

 them together. 



*vSee Farmers'' Bulletin No. 38, U. S. Dept. Agriculture, p. 6. 



