July, 1912.] FUNGICIDES IN THE APPLE ORCHARD. 5 



development of the disease at various times during the season. The 

 contrast in the results is, therefore, not so great as the probable con- 

 trast in fungicidal value of the mixtures, and none of the plots show 

 as good results as would have been obtained if the whole orchard had 

 been sprayed with the best fungicides. 



A chemical analysis was made by the Station chemists of the vari- 

 ous Bordeauxs used in the experiments. The first three columns in 

 the following table give the results of analyses of the product as 

 placed on the market. In the fourth column is given the number 

 of pounds of copper sulfate and in the fifth the number of pounds 

 of lime that a fifty gallon barrel of the mixture would contain if 

 made according to the directions furnished by the company. 



Bordeaux. 



Water. 



Pyrox 



Lenox. . . 



Lion 



French 



Grassellis 



Fairmount 



Standard 



Target Quick 



Eagle 



Leggett's Blue.. . . 

 Leggett's Oxidized 



65.20 



67.87 

 80.00 

 81.60 

 50.19 

 50.00 

 63.00 



54.10 

 4.00 

 7.30 



Copper 

 Oxide. 



2.22 

 1.54 

 3.12 

 3.13 

 7.32 

 7.65 

 4.81 



6.70 



13.73 

 17.80 



Lime Per 

 Barrel. 



.15 

 1.78 

 .97 

 .91 

 2.30 

 1.24 

 3.07 

 6.00 

 2.31 

 4.13 

 2.76 



Tests were not made to determine what other ingredients than 

 copper and calcium compounds might be present. The first three 

 mixtures as given in the above table would have one pound of cop- 

 per sulfate or less to the barrel if made according to directions. 

 The results obtained in the orchard show that their effectiveness 

 was in keeping with their strength. The Fairmount was a very 

 poorly prepared mixture and gave poor results. The Standard, 

 Eagle and Target Quick were stronger in copper sulfate and it will 

 be noted gave fair results but not as good as home made Bordeaux 

 of weaker strength. The Leggett preparations were in powdered 

 form. They were high in copper but did not control the scab. In 

 addition to this they produced serious injury to the foliage. This 

 was especially true of the oxidized mixture. The copper phosphate 

 also produced decided injury to the foliage and the Eagle Bordeaux 

 slight injury. The foliage was free from injury on all the home 



