358 OHIO EXPERIMENT STATION: BULLETIN 214 
By using large quantities of both blue vitriol and water, say 50 
pounds of copper sulfate and 50 gallons of water, a stock solution 
may be prepared, so that each gallon will contain one pound of the 
blue vitriol. In each case the solution of copper sulfate should be 
diluted say to one-half of tank capacity before admixture with the 
milk of lime. 
The quicklime is slaked and then stirred to make milk of lime, 
adding water as needed to dothis. The necessary amount of this 
milk of lime should be diluted to about 40 or 50 percent of the tank 
capacity and then run intoa mixing tank with equal flow of corre- 
~sponding volume of copper sulfate solution before same is run into 
spray tank or barrel, 
All Bordeaux mixture formulae are useful as a vehicle in which 
arsenical sprays are added to serve as insecticides. 
THE USE OF STICKERS IN SPRAY MIXTURES 
Some experiments made in different parts of the country have 
shown beneficial results from the use of other materials added, such 
as sugar solution, soap, resin soap, etc., to increase the adhesiveness 
of the spray. In some spraying experiments by the Entomological 
Department of this Station, laundry soap was used effectively as a 
sticker to hold arsenical compounds in checking the berry worm or 
grape worm (See Circular No. 63). 
The writer has proposed a modification of Bordeaux mixture 
which has been called ‘“‘Bordeaux Mixture and Iron Sticker.” 
The following formula has been recommended: 
BORDEAUX MIXTURE AND IRON STICKER 
Copper sulfate (blue vitriol).........:ceccscesseecesees 2 pounds. 
Iron sulfate (copperaS)...........cssssssssesseeceeees 2-4 pounds. 
Caustic: Mimessiecs gaeadises evacestcavnadenaen sere avsceicen 4-6 pounds. 
Water fomake wi. sigussesnaneiansccnarcaustsiaesieegarnen 50 gallons, 
In this spray the iron sulfate is added in order that it may be 
precipitated by the lime and serve asa more complete sticker than 
is provided by the standard Bordeaux mixture. It would appear 
possible by the weak solution as given for the copper compound and by 
this possible efficient sticker to make the reduced amount of the 
copper sulfate do the work as fungicide just as effectively and with 
less risk of foliage injury than with the standard Bordeaux mixture. 
The trials made up to this time upon apples in full foliage, upon 
grapes and upon potatoes indicate that the spray is efficient. The 
iron sulfate ts not considered a fungicide. 
