EXPERIMENT STATION BULLETINS. 395 



plications is much less than for liquid sprays. However, as the injury 

 done by fungi is often greater than that by insects and it is always 

 desirable to use Bordeaux mixture in liquid form, there will be little 

 or no occasion for applying dust sprays of arsenicals as they can be 

 readily added to the liquid Bordeaux mixture. 



SODA BORDEAUX 



Concentrated Lye 1 pound 



Lime 5 ounces 



Copper Sulphate 2 pounds 



* Water • 50 gallons 



Dissolve the copper sulphate and lye, and slake the lime in two gallons 

 of hot water for each; mix the lime and copper sulphate solution and 

 after adding the lye solution dilute to 50 gallons. 



This is used upon the grape for the black rot and upon other fruits 

 just before they are ripe. 



COPPER SULPHATE SOLUTION. 



Copper Sulphate 2 pounds 



Water ., 50 gallons 



For use before the buds open the above solution is fully as effectual 

 as Bordeaux mixture and is easier to prepare and apply, but it should 

 not be applied to any plant after the buds have opened. For use 

 against the leaf curl of the peach this solution is especially desirable. 

 If used before the middle of April a thorough application will entirelv 

 prevent the attack. 



WEAK COPPER SULPHATE SOLUTION. 



Copper Sulphate 1 pound 



Water 150 to 200 gallons 



A solution of copper sulphate of this strength can be used with safety 

 upon nearly all plants. The stronger solution can be used upon all 

 fruit trees except the peach, for which a weak solution Avould be pre- 

 ferable. Although less effective than Bordeaux mixture, the weak 

 solutions of copper sulphate may be used to advantage where it is not 

 desirable to apply mixtures containing lime. They seem fully as 

 effectual as the ammonia solutions and are much cheaj)er. 



potassiu:m sulphide. 



Potassium Suli)hide (liver of sulphur) H ounces 



Water 10 gallons 



This solution is valuable for the gooseberry and other ])owdery mil- 

 dews, for which it seems even more eff'cctual than Bordeaux mixture, 

 although its effects are less lasting. It does not discolor (he fruit and 

 is quite harmless. 



kerosene emulsion. 



This is a well-known remedy for use upon soft-bodied or scale in- 

 sects that suck the sap. It is made from kerosene, water and soap, 

 either hard or soft, or whale oil. 



To one quart of waler add ono pint oi' sofj or 1\vo ounces of hard 



