New York AGRICULTURAL EXPERIMENT STATION. 697. 
the cost of applying Bordeaux mixture is reduced to the 
actual cost of the ingredients and the labor of mixing them. 
As the Bordeaux mixture is simply a preventive and as 
the disease is liable to make its appearance at any time 
when the atmospheric conditions are suitable, it is 1ecommended 
that the application of the mixtiave bezin soon after the vines 
begin to grow, certainly as soon as the usual time for applying 
Paris green. For the first two sprayings the mixture may be 
reduced to one-half the standard strenz-), i. e., six pounds of 
stlphate of copper and four pounds of lime to forty-four gallons 
or water. As four sprayings should usunily be made, it would 
be advisable to make the last two of full streneth, as at the 
time they are usually applied the conditions are generally such 
that if the disease obtains a foothold it quickly spreads over the 
entire field unless the presence of copper acts as a bar to its 
further progress. As mentioned before,* the conditions 
which are favorable to the development of the blight are 
excessive rainfall accompanied by an average temperature of 
less than 75 degrees F.,** conditions which often prevail during 
the month of September. During the past season experiments 
have been made to find some substance? which added to the 
Bordeaux mixture would cause it to adhere to the 
foilage, thus lessening the number of times necessary to spray, 
and it was found that when soap was added to the Bordeaux 
mixture applied to beans as a preventive of the bean anthrac- 
nose,§ the result was that the mixture spread in a _ thin 
film over the leaf surface and remained visible for weeks 
after the application was made. The amount of soap 
used was, in this case, one pound of bar soap dissolved in but 
water and added to eight gallons of the mixture. 
M. Girard, a French scientist, recommends the use of molasses 
at the rate of five pounds to twenty-two gallons of the mixtures$ 
also in Gardeners’ Chronicle, March 12, 1892, p. 339, is the state- 

* Bulletin 41, page 45. 
** Prof. F. L. Scribner, Tennessee Rep’t, 1889, pp. 34, 35. 
§ Bulletin 48, pp. 314, 315. 
§§ Gard. Chronicle, July 16, 1892, p. 71. 
‘ 88 
